Sentence:  How do they sit there, hour after hour, and listen to the congressional gasbags without blowing their tops? . . . never once leaping over the table, grabbing an inquisitor by his ears and screaming, "Hey, <WSD>flannel mouth</WSD>—does the phrase ‘posturing hypocrite windbag' ring a bell?" 
Meaning of the word marked with <WSD> tags:  One who speaks in an unclear, muffled, or sluggish manner.