From Longman Dictionary of Contemporary Englishbite/snap somebody’s head offbite/snap somebody’s head offto talk to someone very angrily with no good reason I offered to help her, but she just bit my head off. → head
Examples from the Corpus
bite/snap somebody’s head off• You could trust him not to take the mickey, or to turn round and bite your head off.• I could have bitten her head off.• This Katherine bites the heads off rag-dolls and threatens her sister Bianca with a pair of pinking shears.• The gusts are becoming malevolent, snapping the heads off the waves like daisies.• Just to bite their heads off.• He had no right to bite the head off one of his staunchest friends.• Not two minutes in his company and she was biting his head off.• A geek is a carnival performer who bites the heads off live chickens and snakes. 