| 词汇 | not know one's ass from a hole in the ground |
| 释义 | not know one's ass from a hole in the ground tv. not to be knowledgeable; not to be alert and effective. (Usually objectionable.)That stupid son of a bitch doesn't know his ass from a hole in the ground.She is so dumb, she doesn't know her ass from a hole in the ground. |
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