A Professional Liar. Sells products by lying. Slick Bastard that sells you Boss crap and leaves it up to you to prove "The Salesman Lied" it wont do that.
(Plural: salesmen) When pertaining to City of Heroes (aka City of Heroin), a salesman is a member of the "Family" mob that, when found in groups of more than three, will not attack under any circumstances under certain conditions (usually by stunning him, though it varies). The term salesman comes from the fact that he stands in one spot doing a lecture emote and he looks like a street salesman.
A gigantic douche bag. WAY beyond the realm of simply being a douche. A purveyor of douche bags. One who specializes in the sale of feminine hygiene products.