1 - a small, lighter-than-water turd that, no matter how much you flush, refuses to BE GONE!
2 - an obnoxious asshole that you can't seem to get rid of
dude 1 - Man, what's up with your little bro? Every time we fire up a blunt, he's like, THERE!
dude 2 - Yeah, he's pretty much a fucking floater. He needs to get a life or start contributing to the cause!