to beat (somebody) soundly, esp with a stick or whip
to defeat (somebody) heavily or decisively
to beat or strike (something) wildly or violently
to move or wave (e.g. one's arms or legs) about wildly or violently
= thresh (1)
to sail (a ship) to windward
(+ around/about) to move or toss about violently
He was thrashing around in bed with a fever
to deal repeated blows with or as if with a flail or whip
= thresh (1)
thrashing noun
[Old English, alteration of thresh]