Cover your ass是什的意思

Cover your ass 是什的意思 ?
字眼上什為不雅, 但這是佷達意的一句流行說話(在美國), 意即:
Stop showing off your ugly hehaviour.
別自暴其短
遮醜.

"Cover your ass" means to do something to cover up something you did wrong or something embarrassing.