A fast moving competitor in terms of shortening odds. A steamer is usually caused by large sums of money being placed on the competitor and the bookie's reaction to it in order to balance their books to ensure a profit.
(see also "California Hot Plate", "Cleveland Steamer", "Glass Boat", "Freckled Steamer") - When you put plastic wrap over someone's face and shit on it. - TJ
A type of cookware consisting of inserts or layers with perforations in the bottom, that are assembled together and used to cook food with the use of steam.