ass on your shoulders

Being overly defensive, obnoxious, confrontational, or just generally annoying.

Man, you've really got your ass on your shoulders.

by Emby Quinn May 24, 2006

get your ass off your shoulders

This is usually referred to someone who is stuck up or arrogant.

"I wish Mike would get his ass off his shoulders and admit he was wrong for tea-baggin James while he was sleep!"

by cutiepye04 November 3, 2004