{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./
See: HAVE A FIT.