flip out

(verb) to lose control of your emotions

Example Sentences:

The poor schoolteacher flipped out and started crying when she won five million dollars in the lottery.

The workers complained to their boss because the manager was always flipping out over unimportant things.

Boyfriend: We need to talk.
Girlfriend: Okay.
Boyfriend: Please don’t flip out, but I think we should date other people.
Girlfriend: What?! I thought we were going to get married! I hate you!
Boyfriend: I asked you not to flip out!

Media:

Similar idioms:

1. get carried away
2. have a cow
3. blow one’s cool
4. rub salt into the wound