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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