beat (a person or animal) repeatedly and violently with a stick or whip

she thrashed him across the head and shoulders

move in a violent and convulsive way

he lay on the ground thrashing around in pain

she thrashed her arms, attempting to swim

defeat heavily in a contest or match

I thrashed Pete at cards

Newcastle were thrashed 8–1 by the Czech team

a violent or noisy movement of beating or thrashing

the thrash of the waves

a short, fast, loud piece or passage of rock music

after all those twelve-bar thrashes, my fingers were blistered

a party, especially a lively or lavish one

Henry's charity ball had been one hell of a thrash