flip your 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.
flip your lidINFORMAL
If someone flips their lid, they become extremely angry or upset or go mad. Rosa flipped her lid and the confrontation with Sandra turned into a furious fight. She said, `Mom, I think you've flipped your lid.'
flip your lidsuddenly go mad or lose your self-control. informal
A chiefly US variant of this phrase is flip your wig .
flip your ˈlid(American English also flip your ˈwig) (informal)
1 become very angry: When he saw the damage to his car, he flipped his lid.
2 go mad; become mentally ill: After the divorce, she just flipped her lid. She was in hospital for months.