Definition of bite or snap someone's head off in English:

bite (or snap) someone's head off

Reply sharply and brusquely to someone: I made some comment and he bit my head off
More example sentences
  • ‘You too, Dave,’ she replied hesitantly, as if she expected Jill to bite her head off.
  • ‘Yeah the guy bit my head off for it,’ he replied, shrugging his shoulders.
  • I had so much I wanted to say to her, and it was all I could do to avoid biting her head off when she passed a remark about how long it's been since Bro rang her.
See parent entry: head

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Word of the day dinkum
Pronunciation: ˈdɪŋkəm
adjective
(of an article or person) genuine, honest, true