Real Dictionary

go ballistic
to get extremely angry and start shouting or behaving in an uncontrolled way
phrase: If someone goes ballistic, they suddenly become very angry.
phrase: If something goes ballistic, it suddenly becomes very much greater or more powerful, often in a surprising or unwanted way.

go ballistic in American English
to become overwrought or irrational
to become so angry as to lose emotional control

go ballistic in British English
to become enraged or frenziedly violent