slickness

(noun) verbal misrepresentation intended to take advantage of you in some way. Synonyms: trickery, hocus-pocus, hanky panky, jiggery-pokery, skulduggery, skullduggery.

(noun) a kind of fluent easy superficiality. Synonyms: glibness. Example: "The glibness of a high-pressure salesman."

(noun) a slippery smoothness. Synonyms: slick, slipperiness, slip. Example: "He could feel the slickness of the tiller."