把姓倒过来 - Chinese Idiom

把姓倒过来:

Literally means:

write one's family name upside down be very determined.

Actually means:

The Chinese people always respect their ancestry, and his family name stands for his ancestors. So no one should write his family name upside down, which means a great insult to his ancestry.

The whole phrase means one is very determined to do something or he is completely sure of something. It is an exaggeration and often used when one wants to prove his determination.

中国人历来敬重自己的祖先，姓代表了祖先。任何人都不可能把自己的姓倒过来写，因为这是对祖先的极大不敬和侮辱。

把姓倒过来，表示坚决要做成某事，或对所说的事抱绝对肯定的态度。这是一种夸张的说法。常在表示决心时使用。