slickered,a.U.S.|ˈslɪkəd| [f. slicker n.2 + -ed2.] Wearing a slicker. 1972C. L. Cooper Black 151, I could see..slickered cops smoking on duty.1975New Yorker 10 Mar. 29/1 About twelve horses on the track, a few running hard, their slickered riders standing tall in the stirrups.