lose one's head

Verb

lose one's head (third-person singular simple present loses one's head, present participle losing one's head, simple past and past participle lost one's head)

1. (figuratively) To be killed, usually in a gruesome manner.
2. (literal) To suffer decapitation.
3. (idiomatic) To behave irrationally or to lose one's self-control, especially in a distressing situation or as a result of falling in love.
   • Mrs. Ambient's grief was frantic; she lost her head and said strange things.1884, Henry James, chapter 4, in The Author of Beltraffio
   • Losing his head entirely, the young collier raved like a madman, what with pain and fear of hospital.1914, D. H. Lawrence, “A Sick Collier”, in The Prussian Officer and Other Stories

   Synonyms:

   flip out, freak out, head over heels, in love, lose one's marbles, lose one's mind, off with someone's head, panic, wig out

4. (idiomatic) To be dismissed from a job.