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Verb: go off the deep end
Usage: informal
  1. Get very angry and fly into a rage
    - flip one's lid [N. Amer, informal], blow up [informal], throw a fit [informal], hit the roof [informal], hit the ceiling [informal], have a fit [informal], blow one's stack [N. Amer, informal], fly off the handle [informal], flip one's wig [US, informal], lose one's temper, blow a fuse [informal], go ballistic [informal], go mental [informal], blow a gasket [informal], blow one's top [informal], go ape [informal]
     
  2. Behave erratically or irrationally

Type of: rage

Nearest

go game
go hang
go home
go in
go into
go it alone
go mental
go off
go off at half-cock
go off half-cocked
go off the deep end
go on
go out
go out on a limb
go over
go past
go phut
go places
go steady
go through
go through the motions