flip one's lid, to

Also, flip one's wig; flip out. React very strongly or wildly, as with anger, surprise, or excitement; also, go crazy. For example, I'm going to flip my lid if he doesn't show up, or She really flipped out when she realized that she had won first prize, or I think Rob has flipped his wig. These slangy expressions, with their allusion to losing the top of one's head, date from the 1930s and 1940s.

To lose one’s temper, or to become very excited. An American slang expression dating from the twentieth century, it implies the metaphor of a pot boiling over and pushing off its cover. It appeared in 1951 in the New York Times Book Review: “The funniest book of the lot is enough to make a reader ‘flip’ or ‘flip his lid.’” The closely related flip one’s wig needs no explanation.