/ æs; NAmE / noun
1.
( NAmE , taboo , slang ) = arse
2.
( BrE , informal ) a stupid person
SYN fool :
Don't be such an ass!
I made an ass of myself at the meeting—standing up and then forgetting the question.
3.
( BrE , old use ) a donkey
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IDIOMS
- get your ass in gear | move your ass
- get your ass over / in here, etc.
—more at cover verb , kick verb , kiss verb , pain noun
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WORD ORIGIN
senses 2 to 3 Old English assa , from a Celtic word related to Welsh asyn , Breton azen , based on Latin asinus .
sense 1 variant of arse .