S: (n) lather (the foam resulting from excessive sweating (as on a horse))
Verb
S: (v) flog, welt, whip, lather, lash, slash, strap, trounce (beat severely with a whip or rod) "The teacher often flogged the students"; "The children were severely trounced"
S: (v) beat, beat up, work over (give a beating to; subject to a beating, either as a punishment or as an act of aggression) "Thugs beat him up when he walked down the street late at night"; "The teacher used to beat the students"