A complete imbecile who devotes their time to telling awful puns to peers around them, only to piss everyone off to feed from their reactions like a parasite.
Billy: Knock knock!
Jeff: Ughh... Who's there, Billy...
Billy: Car!
Jeff: Oh for god's sake, car who?
Billy: I know you don't "car" for my jokes!
Jeff: Billy, I hate you so much you goddamn pun fucker...