An outburst of rage, frustration, or ill temper. My mom's going to have a hissy when she sees what happened to the car! I was so embarrassed when Danny started having a hissy in the grocery store.
See also: hissy
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
Rur. a tantrum. (Often with throw. Probably refers to an angry, hissing cat.) Jane practically has a hissy fit every time she gets a run in her nylons. The boss is really mad today. It's just one hissy fit after another.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.