Blow one's top is an idiom that means to become extremely angry. The crossword solutions for this term include RANT, EXPLODE, FUME, ERUPT, RAGE, RAVE, SPEW, GOAPE, GETMAD, LOSEIT, SEERED, GETANGRY, HITTHECEILING, and FLYOFFTHEHANDLE. All of these words describe a person who is very angry and has lost control of their emotions. They are all synonyms for the phrase 'blow one's top' and can be used to describe someone who is in a fit of RAGE.