know one's ass from a hole in the ground

动词 v.
中文释义

英文释义

动词 v.
  1. To have an adequate level of knowledge or skill; to understand what one is doing or talking about. idiomatic,vulgar
    — "Why are you so sure and they aren't?" the landsman said. . . . "Because Mr. Ricimer knows his ass from a hole in the ground, sir."

词形变化

knows one's ass from a hole in the ground present,singular,third-person knowing one's ass from a hole in the ground participle,present knew one's ass from a hole in the ground past known one's ass from a hole in the ground participle,past know the difference between one's ass and a hole in the ground alternative

词汇关系

反义词
know one's stuff
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