Humper is deragotory slang for a person seen as a square. Similar usage to looser, pud or wad. Ocasionally used in a more general greeting amongst friends, as with terms Dude or coach.
Check out the guy with the pink tie trying to impress the waitress, what a humper.
di :BEATNIK 02 giugno 2004
Nickname for a woman who is sexually active to the extreme; who possesses an agressive sexual history and is actively seeking multiple partners at any given moment (a horny humper).
di Kumachan 10 agosto 2004
A morbid obese man who is obsessed with humping random objects around his home. He spends most of his time in his bathroom humping the shower curtain. He also fantasizes about a hispanic girl named Vanessa watching him as he humps the objects. Oh what fun he has!
di Melanie101 04 febbraio 2010