Definition of hissy fit noun from the Oxford Advanced American Dictionary

     

    hissy fit

     noun
    noun
    NAmE//ˈhɪsi ˌfɪt//
     
    [countable, usually singular](informal)
     
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  1. 1a state of being bad-tempered and unreasonable synonym tantrum
  2. 2 She threw a hissy fit because her dressing room wasn't painted blue.
See the Oxford Advanced Learner's Dictionary entry: hissy fit