rude slang 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 shit-fit when she sees what happened to the car!Hey, don't have a shit-fit—we can fix this mistake.
have a shit-fit
tv. to have a fit; to throw a temper tantrum. (Usually objectionable.) If I’m not home on time, my father’ll have a shit-fit.