If someone bites your head off or snaps your head off, they speak to you in an unpleasant, angry way, because they are annoyed about something. And don't bite my head off just because you're fed up! I don't know what's wrong with Julia but she snapped my head off just now. See also: bite, head, off. If someone bites your head off or snaps your head off, they speak to you in an unpleasant, angry way, because they are annoyed about something. And don't bite my head off just because you're fed up! I don't know what's wrong with Julia but she snapped my head off just now. See also: bite, head, off. Snap someone's head off. If someone bites your head off or snaps your head off, they speak to you in an unpleasant, angry way, because they are annoyed about something. And don't bite my head off just because you're fed up! I don't know what's wrong with Julia but she snapped my head off just now. Bite someone's head off Fig. to speak sharply and with great anger to someone. (Fixed order.) Don't bite my head off! Be patient. I'm very sorry I lost my tempter. I didn't mean to bite your head off. See also: bite, head, off McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.