回复：

请教，be at someone  for something 是求人做某事的意思吗？ 

我看电影跳楼男中那个警察就说they been at me for this，说的是捐献精子。 

不过我在网上查不到有这个词组或be at someone的解释。

 

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“To be at someone" means “to be sexually aggressive toward that person”.

Example:

She is pregnant, because he was at her whenever possible :-).