thrash
Definitions
To move in a violent or convulsive way.
To defeat someone thoroughly in a game or contest.
To beat a person or animal repeatedly with a stick or whip.
Examples
The fish began to thrash about wildly as soon as it was pulled from the water.
The band decided to thrash out a new song during their late-night rehearsal session.
The heavy metal music encouraged the crowd to thrash around in the mosh pit.