原文地址

write it off

不要放在心上了。

If you write someone or something off, you decide that they are unimportant or useless and that they are not worth further serious attention.

认为....不重要或者无用，不值得再去注意或者在意

write意为“写”，off是“抹掉”，把写的东西抹掉，引申为“不要放在心上”。当你的朋友因为不开心的事而烦恼时，可以用这句话来安慰他。

Lily: I made a mistake over the bill yesterday. I should take the blame.

莉莉：我昨天把账算错了，我要为过失承担责任。

Jane: Write it off.

简：不要放在心上了。