1. The name of the coolest fucking person alive, usually one to have sex with all of your friends' girlfriends
2. Someone with a huge penis
3. One who owns all others at everything forever
I can't believe you had sex with my girlfriend Jasper, you motherfucker! It's okay though, cuz you're Jasper.
Girl: Holy shit! That is one huge dick!
Boy: I know, I'm a Jasper.
Dude, you are such a jasper