First off, there's the Guy. That's what his fraternity brothers call him. He's the guy. I get so confused by this. "Mike, where are you going?" "Over to the Guy's, then probably downtown."
Then there's this girl who lived on our dorm floor. I lived in the party dorm, and usually it was all upperclassmen guys and freshmen girls (gee I wonder why) but this girl was a junior and still in our dorm. Between guys my boyfriend knew and guys I knew, we figured she'd slept with 90 million guys. At first we all just called her dirty, but then in a fit of drunken inspiration our guy friends named her Ewok. She shacked at the frat by us a lot so we've spread it to Greek row now.
This other girl kept hooking up with my friend's roommate, and she was just about the ugliest thing ever, so they started calling her Big Ol' Truck. She thought it was after the song, but it definitely wasn't.
This one is vintage from high school, but it's so funny that we still talk about it. There was a girl who sat at the lunch table behind ours (you know how lunch tables are) who ALWAYS had a huge gap in her pants so her asscrack was showing. We started calling her Crackass. This alone isn't funny, but when stupid Phi Tau and I were broken up for a while and he wanted me back, I used to make him do these tasks. I decided one of his tasks was to drop a goldfish in her pants, and lo and behold he did!

She was in Honors Band with all of us the hour after lunch and nobody could stop laughing at her bouncing as she played her clarinet.