捞油水

(coll.) to gain profit (usu. by underhand means)

to fish up / to dredge up

oil / fat / grease / petroleum / to apply tung oil, paint or varnish / oily / greasy / glib / cunning

grease / profit / ill-gotten gains

surname Shui

water / river / liquid / beverage / additional charges or income / (of clothes) classifier for number of washes