flip one's wig

ROGET THESAURUS

flip one's wig

Insanity

VB be insane, become insane, lose one's senses, lose one's reason, lose one's faculties, lose one's wits, go mad, run mad, lose one's marbles, go crazy, go bonkers, flip one's wig, flip one's lid, flip out, flip one's bush, rave, dote, ramble, wander, drivel, have a screw loose, have a devil, avoir le diable au corps, lose one's head, render mad, drive mad, madden, dementate, addle the wits, addle the brain, derange the head, infatuate, befool, turn the brain, turn one's head, drive one nuts.