flip one’s lid

flip (one's) lid

1. To react to something with strong emotion. The reaction can be to something positive or negative. I had to talk to Mr. Myers about the botched report today, and boy, did he flip his lid. I knew Aunt June would be excited to hear I'm getting married, but she totally flipped her lid!
2. To go insane. Used humorously. Everyone thought I'd flipped my lid when I quit my lucrative marketing job and moved to India.
See also: flip, lid
Farlex Dictionary of Idioms.

flip one’s lid

verb
See flip one’s wig
See also: flip, lid
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • all for the best
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • a straw will show which way the wind blows
  • a ghost at the feast
  • a crack at (someone or something)
  • all right
  • (you) wanna make something of it?
  • a thing of the past
  • a slew of (something)