urx unit loader Justin Bieber urinates into restaurant mop bucket then decries ... President Bill Clinton?

Justin Bieber acting out of control and as if he can do anything he wants continues, as TMZ has video of the pop star urinating into a mop bucket in a restaurant kitchen.

TMZ is told the clip was shot earlier this year when Bieber and his entourage were leaving a nigihtclub by exiting through the restaurant kitchen. And instead of using a restroom like a normal person, Bieber decides to pee in some poor janitor’s mop bucket while laughing like an idiot.

And his “Wild Kidz” entourage buddies act like this is a moment to remember.

Then on the way out of the restaurant, Bieber sprays window cleaner on a photo of President Bill Clinton that hangs on the wall, shouting, “F*** Bill Clinton.”

So, have we started an office pool yet for the total implosion of Bieber? Whatcha got?