Shut up retard

A great way to greet your boss or other superiors

Boss: Hey Mike!
Mike: Shut up retard!

Shut your thoughts up

A phrase used do to the pre notion of someone saying something stupid, obnoxious, rude, or negative.

Matt walks in the door with a disgruntled look on his face. Liz is getting the kids ready for bed. The dishes aren't done.

Matt: thinking to himself "why aren't the dishes done?"

Liz:" shut your thoughts up!"

Butt shut

Using one's butt or hips to completely close an already locked door on a vehicle that is not completely closed.

I had to butt shut his car door to get the dome light to turn off.