What is another word for goes mental?
Pronunciation: [ɡə͡ʊz mˈɛntə͡l] (IPA) 
There are several synonyms for the phrase "goes mental." These include going crazy, losing it, flipping out, having a meltdown, freaking out, going berserk, having a fit, becoming unhinged, going off the deep end, losing one's cool, and going bonkers. Each of these phrases describes a state of extreme emotional distress or becoming overwhelmed to the point of losing control. It is important to remember that mental health concerns are serious and should not be trivialized or joked about. Seeking professional help is always the best course of action when experiencing overwhelming emotions or struggling with mental health issues.
