noun
[ C , usually sing. ] ( informal ) a state of being bad-tempered and unreasonable
SYN tantrum :
She threw a hissy fit because her dressing room wasn't painted blue.
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WORD ORIGIN
1930s (as hissy ): perhaps from hysterics via Latin from Greek husterikos of the womb, from hustera womb (hysteria being thought to be specific to women and associated with the womb).