"Whatcha lookin' for, Boss?"
Boss? Several times in the last couple of years I've been addressed that way, but before that, never. Where did it come from? Is it a rap thing? An artifact of the prison-industrial complex? It's weird, and vaguely insulting. Whatever happened to "May I help you, sir"?
The Urban Dictionary lists 94 definitions of the word. Number nine:
An employee of the state or county entrusted to guard prisoners; the prison guard, the jailer, the warden, the bailiff. The Man.
Yeah, that's it.
Disingenuous form of address used by insolent little twats, which although ostensibly deferential, actually implies that they don't actually have any respect for you at all.