Title says it all. These are probably not the best I've heard, just what I found looking through my music library right now. I still think they're pretty good though. Also, keep it short. No whole verses.

I never sleep, cause sleep is the cousin of death -Nas

Ask Beavis I get nothin' Butt-head -Big L

if you go platinum, it’s got nothing to do with luck,
it just means that a million people are stupid as fuck -Immortal Technique

You couldn't make the crowd throw up their hands if they swallowed their fingers -Eminem

I aint go to highschool, I went to school high -Sheek

Meh, these really aren't that great and I wanted to come up with more. But it's 4 AM here and I'm tired as hell so I'm going to sleep now instead. Hopefully you can come up with some better.