"You might be a redneck if... the blue book value of your truck goes up and down depending on how much gas it has in it"

This quote by Jeff Foxworthy is a funny method of explaining the stereotyped qualities of a redneck. It implies that a hillbilly is someone who drives an old, run-down truck that is unworthy much money. The joke is that the truck's value is so low that it changes depending upon how much gas remains in it. This is a humorous way of poking fun at the idea of a hillbilly, as it indicates that they are not really rich and have to drive an old, unreliable automobile. It likewise implies that rednecks are not extremely advanced and do not comprehend the concept of a vehicle's worth. Overall, this quote is an amusing way of pointing out the stereotypical attributes of a redneck.