"Become livid" is a phrase used to describe someone getting extremely angry, upset or infuriated over something. There are several synonym phrases that can be used as an alternative to "become livid". These include "go ballistic", "flip one's lid", "lose one's cool", "blow a fuse", "hit the roof", "fly off the handle", and "see red". Each of these phrases convey a sense of aggressive and intense emotions, indicating the degree of irritation, annoyance, and indignation that a person is experiencing at that moment. Using these phrases can be an effective way to describe someone's state of mind when they are extremely angry.