Hipster definition of a bum. Usually drop outs or community college specials around the age of 19-20.
Matt: Can I bum a stoag
Jeff: Yeah, for a buck, its 9 bucks a pack dude.
Matt: I'm short man, I haven't gotten payed yet.
Jeff: That's because you're a fucking bum who doesn't look for work
Matt: No, I'm an artist, my paintings just haven't taken off yet and my band's been too busy to record.
Jeff: Oh. Well in that case, go fuck yourself.