Definition of "Lather" :

noun: the foam resulting from excessive sweating (as on a horse)

noun: the froth produced by soaps or detergents

noun: a workman who puts up laths

noun: agitation resulting from active worry

verb: rub soap all over, usually with the purpose of cleaning

verb: exude sweat or lather

"This unfit horse lathers easily."

verb: form a lather

"The shaving cream lathered."

verb: beat severely with a whip or rod