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Related to conniption fit: hissy fit
have a fit
To become very or unreasonably angry or upset; to have an outburst of rage, frustration, or ill temper. My mom's going to have a fit when she sees what happened to the car! I was so embarrassed when Danny started having a fit in the grocery store.
n. a burst of anger; a spaz. He had a conniption fit over the question of my marriage to Fred.