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An actual challenge, not a prank, to see how long one can withstand swishing a full shot (the cup attached on the bottle) of Listerine - *Cool Mint* inside their mouth. This is usually very difficult to do for most people, given the fact that the formula for most Listerine products gives a burning sensation that damages the sensitive tissue inside your mouth. But on the plus side, the victim of the Listerine Challenge gets a cleaner, fresher, mouth. **this is in no way promoting the products of Listerine, or any dentists. See also: cinnamon challenge
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