挥汗如雨

挥汗如雨	huī hàn rú yǔ	to drip with sweat / sweat poured off (him)
挥	huī	to wave / to brandish / to command / to conduct / to scatter / to disperse
挥汗	huī hàn	to sweat profusely
汗	hán	see 可汗, 汗国
汗	hàn	perspiration / sweat / CL:滴,头,身 / to be speechless (out of helplessness, embarrassment etc) (Internet slang used as an interjection)
如	rú	as / as if / such as
雨	yǔ	rain / CL:阵,场
雨	yù	(literary) to rain / (of rain, snow etc) to fall / to precipitate / to wet