A group of my friend's decide to all have a guy's weekend at a big St. Patrick's day party in the town one of my best friend's lives in. We all had a great day, but about midday me and one of my buddies are standing in the beer line. He starts talking with a decent looking girl (7 or so) also standing in the line and things appear to be going pretty good with him, but my friend is a total goofball and always horsing around.
We finally get to the front of the line and he asks the guy for two beers (1 for me, 1 for him). The girl goes "ooh, hey - get me one too!". So, my buddy changes the order - "ok, and get her a beer too." The beer guy asks for money and my friend pays exactly the amount for two beers. When the beer guy inquires, my friend says "oh, that one is hers, not mine". So, the girl gives my friend a shitty look, we grab our beers and walk on. About 10 minutes later, that girl finds us and she is PISSED OFF. She's screaming and yelling and calling my buddy a cheap asshole. "I asked you to buy me a beer!!!". "No, you asked me to #get you a beer. And I got you a beer", he responds. That girl was having none of his argument and continued to just scream and cuss and make a scene, while my buddy is laughing so hard that he's about to puke. The entire rest of the day - no shit, that girl followed us around and anyone we'd talk to, she'd yell "Don't talk to that guy ladies, he's a cheap asshole!!". At first it was funny, but then it got old and we started getting angry and she was seriously ruining our game. As the day wears on, our group gets separated, people are getting drunk and we're hungry. We all leave and decide to reconvene at my host friend's house. We go back, lay around for a bit and eat and then that night all head back out to another local bar.
We get out and are having our usual guy horsing around stuff, when we meet a whole table of really, really hot girls. We all kind of pair off and are all talking with our respective girls when I hear this yelling. I look up - and I'll be damned if it's not that same damn drunk bitch, screaming at the top of her lungs that those girls need to stop talking to us, as we're all cheap assholes. As luck would have it, those girls somehow knew this cockblocking witch, so they indeed did quit talking to us.
I loathed that skank with every ounce of my being that night, and for several weeks afterward - but I have to admit, she took cockblocking to a whole new level for me.