open a can of whoop ass

ass over teakettle

Tumbling upside down.

beat someone's ass

To thrash someone.

bite my ass

Go away!; an expression of disdain or dismissal.

bite my shiny metal ass

An expression of discontent or aggravation to another party.

bust ass

To work hard, especially when trying to achieve a goal.

cover someone's ass

To make preparations or take precautions to ensure that a person is not blamed or punished for his or her conduct.

drag ass

To move slowly, or lag behind.

find one's ass with both hands and a flashlight

Synonym of know one's ass from a hole in the ground.