1. n. someone who “cleans” ill-gotten money by buying cashier’s checks at banks and shifting funds from place to place, often in small transactions. (see also greenwash, launder.) I think the guy at the first window is a smurf. He’s in here twice a week with $9,500 in cash each time.
2. tv. & in. to shift illicit money from place to place to conceal its origin, often in small transactions. (Underworld.) I smurfed a fortune for a famous drug kingpin and got fourteen years up the river—with some very interesting people.