A relationship takes a lot of work, and it's important for partners to establish trust between one another. But that trust can be shattered (if it was ever there, to begin with) in a single moment.
These people couldn't believe their eyes and ears when their ex did something completely bonkers. From that point on, they knew they had to "NOPE" right out of the relationship, ASAP!
(Content edited for clarity)
Sign On The Dotted Line

“After dating this girl for about a year, her parents surprised me with a contract stating I would propose to her within three months. They were a non-religious family, and it had nothing to with their cultural tradition.
The contract included a specific date by which I needed to propose with a diamond ring. There was nothing written in regards to what happened if I broke the contract since they assumed I’d sign and propose without question or hesitation. I thought my girlfriend would share my concern, but she actually thought I was being irrational for not signing. Needless to say, I noped right out of that relationship.
After we broke up, her parents threatened with legal action (I don’t know what for), but that was enough to convince me to cut all ties with that family.”
She Was All Bark, And A Whole Lot Of Bite

“She bit me twice… once on my arm, and then on my butt. These were not fun, love bites… we were in an argument and she got violent.
She took a chunk out of both places. While she still had her jaw clinging to my butt, I fought back to make her release me. She was shocked. She called the cops. They showed up and arrested her.
I was the one bleeding after all.”
Have Fun Getting Into A Car Crash Without Me

“I didn’t wash a bowl in the sink before work. I said, ‘I went to do it but got distracted… and I didn’t.’
He decided to teach me a lesson by speeding the car up and then slamming on the brakes, stopping just before hitting the car in front of us, which was stopped at the lights. Then he turned to me and said, ‘I was going to smash into them but I changed my mind… and I didn’t.’
Yeah, he didn’t last long after that. It was weird, and looking back it didn’t make sense what he said, but it scared the crap out of me at the time.”
I Think You’re A Bit Confused About Our Arrangement

“We had lived together for about 4 months, after dating for about a year. Things were going pretty OK, until one day I got called into work super early, so I got home somewhat early. When I arrived home, she was also at home. Perplexed, I entered my apartment to find her watching TV instead of being at work. When I inquired about the situation, she let me know that she asked her boss to cut her back to just three part-time shifts a week, from her five full-time shifts she was working.
I asked for her reasons for cutting her hours. Her explanation was that 15 hours a week paid her bills, so she simply did not need to work more. When I told her that the rent, utilities, groceries and other regular bills still had to be paid, she said I could just work more to cover the community bills.
Now, I worked in the oil fields at the time and was already pulling 12 to 14 hour days every day, and I worked 11 days between days off, so there was no way I was going work on my days off just because she didn’t want to work. No matter how much we talked about it, she refused to work a full-time job. The warning bells started ringing, and I got the feeling this was just the tip of the proverbial iceberg.
We broke up two weeks later.
No regrets.”
Is That How You Think People Propose Marriage?

“I bought a townhome and as soon as I bought it, she hired movers to move in with me. We had only been dating a couple of months and I was not ready to have her live with me. Before then, she had been ‘weird’ but nothing crazy.
When I asked what she was doing, she said, ‘You bought a house, so I assumed we were going to move in together.’
When I told her I bought a house because I wanted a home, not because I wanted her to move in, she freaked out. She made a scene, crying and screaming like a child until I paid the moving company to take the stuff back to her house. For whatever reason, I didn’t break up with her after that. I later found out that she had poked holes in my rubbers and was not taking her birth control.
Noped the heck out. Just a few months ago, I was getting dinner with my current girlfriend and I saw my ex in the corner of the room. She came up and started shouting at me for cheating on her.”
Please Let Me Read Harry Potter In Peace

“She pulled out a knife and started running in circles around the house with it.
I was on a bus back home the next day.
I guess I should provide a little context. The short version, right before that, she was mad about something her cousin had done, so she came in to complain to me about it. I was busy reading Harry Potter and not listening to what she was saying, so she hauled off and punched me in the balls. She immediately had my attention. I jumped up all ‘what the heck?!’ and she started to punch me. I grabbed her by her wrists and stopped her. She settled down a little, and I let her go. Then she went and grabbed a knife and started circling the house.
The long version is a lot more complicated – she had a lot of very dark stuff in her past. But that doesn’t mean it was okay to do what she did.”
He Gave New Meaning To The Term “Casual Dating”

“I was admitted to hospital after nearly having a heart attack. I passed out, got taken to the hospital for a cause, and had to get potassium-infused because it was extremely low. I was informed there was over a 90% chance I’d have had a heart attack, and 50ish% chance it would be fatal.
He texted me, asked what I was up to. I told him I was in emergency care, that I had almost died, and I was extremely upset. It was 2 am.
He replied, ‘cool.'”
Those Sentences Were All She Needed To Hear

“I’ve got three because I had great taste in men in my late teens and early 20s.
1. ‘If I put this pillow over your head and just hold it down until you’re dead, no one will be able to hear you scream.’ This was not said in a joking manner. Thank god my roommate came back.
2. ‘Just so you know, our SONS will be raised Catholic.’ I was 19, in college, and we’d been in a long-distance relationship for maybe six weeks at the time. I wasn’t thinking about kids at that time. His emphasis on the fact that he would have SONS was also disconcerting. Not kids, SONS.
3. He drove himself $75,000 into debt taking care of his father, who refused to hold down a job despite being perfectly capable of doing so. He was living hand-to-mouth while enabling his dad to live in a lovely apartment (and then paying to move him when he got kicked out of that apartment), buying him expensive food, drinks, and smokes. He would then get stressed and smoke, and lie to me about his smoking. At this point, I was older and starting to think about marriage and having kids someday, and I realized that I didn’t need someone with that kind of baggage. I didn’t want to get married to someone who had those kinds of co-dependency issues with his father.”
He Was Not Prepared That Night, And Even Less Prepared For What Came After

“We dated for a few weeks, and then the night came to get down.
Since sleeping with someone doesn’t happen often for me, I don’t typically keep a rubber in my wallet or on my person. She says she wants to do it and I tell her ‘I don’t have a rubber,’ to which she replies, ‘It’s fine.’ Being the aroused non-thinker I was, I got to work.
A few weeks go by and she tells me she’s late, and to be prepared to be a father. This was a shock and not the ideal situation, but I put myself in it, so I decided I was going to see it through. Another two days go by, and she’s in tears. I ask what the matter was, and she said she got her period. I looked confused and she yelled, ‘I wanted to have a child with you and it didn’t work and now we have to try again!’
I’ve never ghosted someone so fast in my life.”
If She Couldn’t Handle The Responsibility, That’s Her Loss

“Man, I was such a fool…. there were soooo many warning signs. My ex used to disappear and not come home at night, not answer her phone, etc. Then, she got pregnant and broke the news by telling me that she had flushed her birth control down the toilet. I respect a woman’s right to choose, so now I have a lovely 12-year-old daughter.
I didn’t leave when she told me she was pregnant. But when my daughter was born, my ex started doing the same thing again, drinking, screaming, etc. I broke up with her and we started sharing our daughter at about a 50/50 split. A bit later, I transferred to a university and stupidly decided to give it one more shot. After living at university with her and our daughter, I found out all of her trips back home were to have an affair. I was like, what the heck? I’m in college, working two jobs, and taking care of the baby all at the same time, and she’s off cheating on me with some guy.
So I noped out. I have had full-time custody of my daughter for ten years, and her craziness gave me the best gift I have ever received.”
How Generous Of You To Go Out With Me

“It was not really a relationship, but a first date.
I was 19 and a junior in college at the time. One of my TAs asked me out. I believe he was 3 years older than I. He picked me up at my apartment and I let him in while I finished getting ready.
He started telling me how he could teach me so much about the world and life in general, and how I had so much to learn, blah, blah, blah. Basically, he was saying I was his inferior, but he’d be happy to teach me until I was more at his level.
It really was a HUH? moment. Why would someone think the way to a girl’s heart was to disparage her intelligence and tell her how superior you were?
I showed him to the door and locked it behind him. I was seriously waiting for him to mess with my final grade, but he didn’t, which is good because I would have rained some vengeance down on his stupid head.”
Who’s Wasting Whose Time?

“I’ve got a recent one. We’d only been talking for a few days, so at this point, there was no commitment, or anything really, beyond a confirmed mutual interest. Immediately, I noticed she was getting a bit clingy, in that she wanted to talk on the phone several times a day. So I’m already in ‘establishing boundaries’ mode right off the bat. Anyway, I was walking home from the store, it had just started raining, and my phone battery was almost dead. I had just enough charge left to listen to an audiobook, but not enough for a phone call. This is when she calls me.
I begin to explain that I’m walking in the rain and my battery’s dead and that I’ll call her when I get home. I didn’t get to finish the sentence, because she starts in with, ‘Look if you don’t want to talk to me, just say it and quit wasting my time.’ Oh, no you didn’t just lay a guilt trip on me for being soaking wet and miserable on the side of the road with a dead battery. I shot back with, ‘Don’t you even start that crap with me or I’ll never speak to you again.” She hung up. That sealed the deal.
My battery did, in fact, die on the way home. I log into Facebook and there are already three messages from her. The first one is angry, the next one is apologetic, and the third one is promising never to start drama again. I just blocked her. I check the phone and there’s a bunch of similar texts. She kept texting for a few days after that and eventually gave up. I didn’t read any of them.
Word to the wise: if there are two ways to interpret your motives, and someone always chooses the interpretation that leads to drama, get the heck away. There was no winning in that situation, and that’s how it always goes with people like that. If you’re the trusting sort like me, the tendency is to take their complaints at face value and try to make things better the next time. It will never happen. I’ve wasted a lot of time on people like that, and I was pretty proud of myself for finally recognizing those head games on sight and putting a stop to it immediately.”
I’m Getting Some Mixed Signals Here

“She told me she couldn’t have a baby because something was wrong with her. I thought oh well, that sucks but whatever.
Then she started constantly asking me about baby-related stuff and how she really wants a baby even though she told me she can’t have one. I started to wonder what was up at this point.
We went on holiday for a month. We came back, and I was still dating her and talking to her constantly, but found out she had blocked me on Facebook. Obviously, I was getting massive red flags at this point.
She started acting altogether really weird, so asked her what was going on, and told her that I just wanted her to be honest. It turned out she was pregnant and is now a single mother.
I think I dodged a bullet.”
Clearly Someone Has An Issue With Respecting Boundaries

“He went through the messages on my phone twice. Each time was after a fight because he knew I would have ranted to my friend about it. Then he tried starting a fight about what he read.
I got harassed by him for 3 months after I ended it. It only stopped when I had to get a police officer to go tell him he’s not to be anywhere near me anymore or contact me anymore.
I later found out his first girlfriend got a restraining order against him for the same reasons.
This was especially frightening when you take into account we were only 17 years old.
I Get That You Were Trying To Be Romantic, But Wow

“He drove to my house in the middle of the night without telling me (I was 17, he was 22) and left me Sylvia Plath’s ‘The Bell Jar’ in my mailbox, complete with a wolf tooth and a love letter that just had the phrase ‘I will not leave you’ over and over again, taking up the whole page.
He also told me he used to go on the Internet and lurk disturbing threads because it helped him in some way? Also, one time when we were going at it, as he was about to finish, he did so on my back and moaned ‘eject all.’ He was probably the weirdest guy I had ever met, and I honestly don’t know how we even got involved in the first place.”
The Closer We Get, The Bigger Our Debt

“What really threw me off was her complete inability to leave money in a checking account. She had a frightening compulsion to spend more than we had.
I kept thinking that she would settle down once we had a few items for our apartment.
After 6 or 7 years, I finally realized we could never dig out of the debt we had, and we broke up. I took $10,000 in credit card debt (to pay off the guilt I felt for leaving her) and lived in a shack to save up money.
Within a year or so, I had paid off the bills and started watching my bank account grow and grow. It became a game for me and I still kept living like a pauper.
By the time I met somebody else (and proposed), I had so much money that my new wife yelled at me for not putting my money in a savings account where I would earn interest. She was right. But it still broke my heart to switch accounts and see my checking account game get reset.
Oh, and we celebrated 17 years of marriage this year. She’s a keeper.”
She Did A Little Digging, And Didn’t Like What She Found

“We were not in a relationship, thank God, but after the first date, I had a weird feeling.
The red flags stood out. First, he was slightly irritated to learn I was in my 30’s even though he was 40. As in, he was irritated I was not younger than that (I look much younger than I am). He was not angry, more just irritated, but you could tell he was slightly disappointed.
Then, when I mentioned how I used to be incredibly gullible and naive, he took quite an interest in that. Too much of an interest.
So that night after I got home, I googled him but couldn’t find anything. I talked to my upstairs neighbor about him and showed her a picture. Luckily for me, she knew who he was because he went to school with her ex-husband.
Turns out I couldn’t find him because he gave me a fake last name. I looked him up using the correct name and what I found made me sick to my stomach.
Not only was he almost 10 years older than what he told me, but he also had 1 conviction and 2 arrests for stalking young women. I read the documents and their physical description matched mine to a T (hair type, body type, etc.).
I noped out of that situation real quick and told him never to contact me again. Thankfully, he never did.”
You Could Have Timed That Better

“She broke up with me while we were doing it. Like right in the middle of it.
‘I cheated on you because I don’t think I’m good enough for you after this we should see other people too.’
I just stopped and stared for a looooong time before I was ready to talk, which resulted in her leaving me a crying mess. It broke my heart that she could be so self-destructive and hate herself that much.
Four months later, she asked if we could get back together and she was VERY upset that I noped out of that one. Then she dipped out of my life completely when she found out I had been seeing a girl who turned out to be her boss. I didn’t even know they worked at the same King Soopers location until she told me.”
I Don’t Get It, Did She Want Him To Stand Outside Her Window And Wait?

“She told me a story about how she once had a stalker that would stand in her backyard and stare at her through her window at night. He somehow had her number and would call her and tell her he liked her bra, the color of it, etc.
It got weirder when she took me out to her backyard to show me the ‘exact spot’ where he had been standing (even though she claimed to never have actually seen him). She told me many other wild ‘facts’ – that she thought it was this guy that went to school with us, but she wouldn’t tell me his name, that she got letters from him claiming he was in love with her, but she couldn’t show me them, things like that. None of them added up, and it was so obviously a lie.
The final nail in the coffin was when I got a Facebook message from her ‘mom’ on Facebook, having never met her or spoken to her before, trying to convince me that her daughter was telling the truth. It was OBVIOUSLY HER, and she went on to her mom’s Facebook account and sent me the message.
I completely ended contact with her after that.”