go apeshit

present singular third person goes apeshit · participle present going apeshit · past went apeshit · participle past gone apeshit

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

   Naturally, the touchy airline crew went apeshit and when the plane landed, the LAPD was waiting for Mr. Zizza.

   2003 May 1, Ann Romano, “One Day at a Time: The Week in Review”, in The Portland Mercury, retrieved 16 Jun 2009

   2 more examples

   Dexter's vocals are competent enough: his timbre is thin and eternally teenaged, but he can go apeshit on the hiccupy histrionics like no one's business.

   1999 August 26, Buddy Seigal, “Even Old Englishmen Still Get Wood”, in OC Weekly, retrieved 16 Jun 2009

   He walked down the street and I was looking past him and he went apeshit—"What the fuck you fuckin’ looking at? I’ll fuckin’ kill you."

   2008 January 23, “Socialista Doorman Jeffrey Trunell Wants to Let You In But Sometimes Can't”, in New York Magazine, retrieved 16 Jun 2009

   Synonyms: blow one's top, go ape, go ballistic, go bitchcakes, go postal, go crazy, go nuts, go bananas