make an ass of

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.

cannot make it

Cannot reach satisfactory or expected standards or do something competently; describes someone in a hopeless situation.

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.

doctors make the worst patients

It is difficult to advise people on subjects that they are experts on.