Slickers meaning : One who or that which slicks. (originally North America) A waterproof coat or jacket. A person who is perceived as clever, urbane and possibly disreputable. (abbreviation of city slicker.) A swindler or conman. A symmetrical knife with a handle at each end, used for burnishing leather. A curved tool for smoothing the surfaces of a mould after the withdrawal of the pattern. A two-handled tool for finishing concrete or mortar; a darby. A brush for grooming a cat and removing loose fur.