snap someone's head off idiom
呵斥（某人），怒气冲冲地抢白（某人）
to answer someone in an unreasonably angry way
There's no point trying to discuss anything with him if all he's going to do is snap your head off. 如果他只会怒气冲冲地呵斥你，就没必要和他讨论任何事情。
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