-tmz
Justin Bieber is an oblivious, self-important little twit who goes out of his way to make the working man’s life miserable — just watch this video of the singer pissing into a restaurant mop bucket … and laughing like he’s the king of the world.

The clip was shot in NYC earlier this year — we’re told Bieber and his idiotic friends were leaving some nightclub, exiting through a restaurant kitchen, and Bieber decided he needed to take a leak.

But rather than go to a bathroom like a civilized person, Bieber — wearing pants that should literally be illegal — whipped out his junk and whizzed into a yellow mop bucket used to clean the restaurant’s floors … meaning whoever’s job it was to mop the place up had to physically change Bieber’s disgusting piss water.

And the worst part … Bieber’s friends act like the restaurant should be HONORED that the singer decided to piss there. It’s revolting.

Justin Bieber…
 Harmless Fun
 What A Jerk
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We can’t say for sure if the group was drunk, but it sure sounds like they were.

Oh yeah, at the end of the video, Bieber sprays a photo of Bill Clinton with cleaning liquid for some reason … saying, “F*** Bill Clinton!”