"Give a fit" is a phrase commonly used to describe a sudden outburst of anger or frustration. However, there are several synonyms that can be used to convey the same meaning. Some of these synonyms include "throw a tantrum," "have a meltdown," "lose it," "fly off the handle," "blow a fuse," and "go ballistic." All of these phrases convey the idea of someone losing control of their emotions and reacting in an explosive way. Using different synonyms can add variety to your writing and help you more accurately convey the appropriate emotion in the context of the situation.