go apeshit

Etymology
See.

Verb

 * 1)  To behave in an extreme manner; to act without restraint, especially by becoming explosively angry.

Synonyms

 * blow one's top
 * go ape
 * go ballistic
 * go bitchcakes
 * go postal
 * go crazy
 * go nuts
 * go bananas
 * flip out
 * hit the roof
 * hit the ceiling
 * lose it
 * lose one's rag
 * lose one's temper