[thrash] vb [alter. of thresh] vt (1588) 1: to separate the seeds of from the husks and straw by beating: thresh 1
2. a: to beat soundly with or as if with a stick or whip: flog b: to defeat decisively or severely "~ed the visiting team"
3: to swing, beat, or strike in the manner of a rapidly moving flail "~ing his arms"
4. a: to go over again and again "~ the matter over inconclusively" b: to hammer out: forge "~ out a plan" ~ vi 1: thresh 1
2: to deal blows or strokes like one using a flail or whip
3: to move or stir about violently: toss about "~ in bed with a fever" syn see swing
[2]thrash n (1840): an act of thrashing