Getting dumped for a chump. It's when you're friends with some chick who you hang out with or whatever, who then starts dating some other chump and never talks to you ever again. This leaves you sitting there on a cold leather couch in your underwear playing Wii bowling, drinking stale MGD, and wondering where the hell your friends are. Then after thinking about it, you come to two logical conclusions:
1. The chick totally had a thing for you. Now that she has a boyfriend, she no longer has use for any other guys she wanted to bang. But in the end, you ended up on top because of #2 (see below):
2. The guy she's dating is totally gay and will probably end up beating her out of frustration.
Hey, you handsome hunk of man meat, weren't you supposed to hang out with Helga tonight?
No, she totally chumped me.