lose one's head
LOSE CONTROL, lose one's composure, lose one's equilibrium, go to pieces, panic, get flustered, get confused, get hysterical, lose one's cool, freak out, crack up, go into a (flat) spin, throw a wobbly

[TahlilGaran] English Collocations ▲

lose one's head (over)
v. phr.
1. To panic.
"Let's not lose our heads," the captain cried. "We have good lifeboats on this vessel."
2. To become deeply infatuated with someone.
Don't lose your head over Jane; she is already married.
Antonym: KEEP ONE'S HEAD.

[TahlilGaran] English Idioms Dictionary ▲