Webster’s Revised Unabridged Dictionary · 1913
Slicker
Slick′er (·ẽr), n. That which makes smooth or sleek. Specifically: (a) A kind of burnisher for leather. (b) (Founding) A curved tool for smoothing the surfaces of a mold after the withdrawal of the pattern.
Slick′er, n. A waterproof coat. [Western U.S.]