Sentence:  "<WSD>Flannelmouth</WSD> Fred"—He spends most of his time going around indiscriminately patting all the other employes on the back and saying "You're doing a grand job." . . . But the rest of the hired hands . . . know that after they finish doing their work, he'll ask them to help do his. 
Meaning of the word marked with <WSD> tags:  One who speaks in a glib manner with the intent of deceiving or manipulating others.