FLIP ONE'S WIG

{slang} 1. To lose one's temper. * /When that pushy salesman came back Mom really flipped her lid./ Compare: BLOW A FUSE. 2. To lose your mind; become insane. * /When he offered me three times the pay I was getting, I thought he had flipped his lid./ 3. To become unreasonably enthusiastic. * /She flipped her lid over a hat she saw in the store window./ * /He's flipped his lid over that new actress./