If one player or team thrashes another in a game or contest, they defeat them easily or by a large score.

If you thrash someone, you hit them several times as a punishment.

If someone thrashes about, or thrashes their arms or legs about, they move in a wild or violent way, often hitting against something. You can also say that someone's arms or legs thrash about .

If a person or thing thrashes something, or thrashes at something, they hit it continually in a violent or noisy way.

A thrash is a party.