Sentence:  Bart spies an opportunity to make a quick buck so he channels his inner <WSD>carny</WSD> and posits his sinking house as a natural wonder of the world and its inhabitants as freaks, barking to dazzled spectators, “Behold the horrors of the Slanty Shanty! See the twisted creatures that dwell within! Meet Cue-Ball, the man with no hair!” 
Meaning of the word marked with <WSD> tags:  A person who works in a carnival (often one who uses exaggerated showmanship or fraud).