Definitions

1. adjective

extremely angry or violent, typically in a wild and uncontrollable way

“He went berserk when he saw his favorite team lose the game.”

2. noun

a state of fury or wild uncontrollable anger

“The riot got out of hand and descended into a state of berserk.”

3. verb

to behave in a violent or extremely angry manner

“The fans started to berserk after the referee made the bad call.”