temper tantrum
An extreme and childish display of unreasonable anger, frustration, or distemper. I can't believe you threw a temper tantrum like that just because I didn't want to go see some movie with you! Becca's been having really bad temper tantrums lately. I guess she's just going into the "terrible twos."
throw a (temper) tantrum
To have an outburst of childish or unreasonable anger, frustration, or ill temper. I was so embarrassed when Danny started throwing a tantrum in the grocery store. You're adults, not children, and throwing a temper tantrum every time something doesn't go your way is not the way to address things.