英语短语 to bite someone's head off 意思是气愤地回答某人的问题，而且往往是在对方没有准备的情况下，类似汉语中的严厉斥责。

例句

I'm very sorry I lost my temper, I didn't mean to bite your head off.

Don't bite my head off, it wasn't my fault, I was just explaining the situation.

请注意

另一个短语 to bite your tongue 意思是强忍住不说出的意思。

For example: I had to bite my tongue to stop me from telling her what I really thought.