(also donkey) animal related to the horse, with long ears and a tuft at the end of its tail 驴. 
(infml 口) stupid person 傻瓜; 笨蛋: Don't be such an ass! 别这麽傻了! 
(idm 习语) make an `ass of oneself behave stupidly so that one appears ridiculous 出洋相; 干傻事: I made a real ass of myself at the meeting standing up and then forgetting the question. 我在会上真出了洋相了--一站起来就把问题忘了.