Meaning of “hissy (fit)” - Learner’s Dictionary

hissy (fit)

noun [ C ] uk us /ˈhɪsiˌfɪt/ informal

a sudden strong feeling of anger that someone cannot control:

David, of course, threw a hissy fit when he found out.

(Definition of “hissy (fit)” from the Cambridge Learner’s Dictionary © Cambridge University Press)