Synonyms for Go bananas:

• v.

  •freak out (verb)
  • hit the ceiling,
  • go haywire,
  • blow one's top,
  • lose it,
  • wig out,
  • come unglued,
  • flip out,
  • lose one's temper,
  • go ballistic,
  • blow one's stack,
  • go off the deep end,
  • blow one's mind,
  • lose control of oneself,
  • lose one's composure,
  • blow a gasket,
  • go berserk,
  • crack up,
  • go nuts,
  • go ape,
  • lose one's cool,
  • break down,
  • work oneself up,
  • fly off the handle,
  • flip one's lid.
  •go crazy (verb)
  • go off.
  •go insane (verb)
  • flip.
  •rave (verb)
  • orate,
  • make a to-do,
  • babble,
  • storm,
  • roar,
  • wander,
  • gabble,
  • rail,
  • thunder,
  • prate,
  • rattle on,
  • perorate,
  • go mad,
  • prattle,
  • declaim,
  • rant,
  • carry on,
  • bloviate,
  • mouth,
  • harangue,
  • talk wildly,
  • run amuck,
  • be delirious,
  • jabber,
  • splutter.

• Other synonyms:

  •freak out
  • blow mind,
  • lost it,
  • going off deep end,
  • blowing a gasket,
  • go off deep end,
  • going berserk,
  • breaking down,
  • blowing one's top,
  • going ape,
  • lose temper.
  •rave
  • Mouthed,
  • rattling on,
  • prattling,
  • talks wildly,
  • talked wildly,
  • running amuck,
  • Prattled.
  •Other relevant words:
  • boil,
  • bluster,
  • ceiling,
  • roof,
  • fume,
  • lion,
  • lid,
  • rage,
  • ape,
  • rhapsodize,
  • foam.

Antonyms for Go bananas:

• v.

  • rave
    be quiet, denounce, discourage.
  • rhapsodize
    be happy.