have a fit v. phr. 1. To have a sudden illness with stiffness or jerking of the body.
Our dog had a fit yesterday. 2. informal To become angry or upset.
Father will throw a fit when he sees the dent in the car.
Howard will have a fit when he learns that he lost the election.
When John decided to drop out of college, his parents had fits. [TahlilGaran] English Idioms Dictionary ▲