1. beats or strikes violently and repeatedly
2. moves wildly or violently
3. defeats decisively in a competition
Usage: informal

Examples

• The angry farmer thrashes the wheat with a flail.
• The fish thrashes wildly when caught on the hook.
• She thrashes in her sleep during nightmares.
• The storm thrashes the trees back and forth.
• Our team thrashes the opponents 45-7.
• He thrashes his arms trying to swim.
• The washing machine thrashes the clothes clean.