slicksterU.S.slang.|ˈslɪkstə(r)| [f. slick n.1 + -ster.] A swindler. 1965C. Brown Manchild in Promised Land xiv. 332 All the Muslims now felt as though 125th Street was theirs. It used to belong to the hustlers and the slicksters.1973[see run v. 52 h].