Sentence:  Uncle Sedgwick, who is considered around and about as somewhat of a <WSD>flannelmouth</WSD>, has talked Drizzlepuss into going ice fishing. . . . Uncle can tell you some wonderful fish stories, but, boy, I've never known a guy who's so careless with the truth. 
Meaning of the word marked with <WSD> tags:  One who speaks in a glib manner with the intent of deceiving or manipulating others.