eat someone's ass out

eat (someone's) ass out

1. rude slang To vehemently or furiously scold or reprimand someone, especially in the military. The captain ate my ass out after I came back to the barracks drunk.
2. vulgar slang To sexually stimulate someone's anus with one's mouth.
See also: ass, eat, out

eat someone's ass out

Rebuke or scold harshly, as in Watch it or the sergeant will eat your ass out. This expression became wide-spread especially in the armed forces. [ Vulgar slang; c. 1940]
See also: ass, eat, out