Synonyms for Go off the deep end:

• v.

  •become insane (verb)
  • go crazy.
  •blow up (verb)
  • rave,
  • rage,
  • become enraged,
  • lose control,
  • become angry,
  • lose temper,
  • hit the roof,
  • erupt.
  •flip out (verb)
  • go berserk,
  • blow a gasket,
  • blow one's top,
  • crack up,
  • blow one's mind,
  • lose one's mind,
  • go nuts,
  • go haywire.
  •freak out (verb)
  • flip one's lid,
  • go bananas,
  • come unglued,
  • flip out,
  • lose one's cool,
  • break down,
  • work oneself up.
  •go crazy (verb)
  • go buggy,
  • go daffy,
  • go psycho.

• Other synonyms:

  •
  • run amok.
  •blow up
  • going off deep end,
  • go off deep end.
  •freak out
  • breaking down.

Antonyms for Go off the deep end:

• v.

  • blow up
    let go, let out, shrink, ignore, shrivel, deflate, be calm.