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Easily the most sought-after crotched expression, the slippery smile, aka the hungry cha-cha, describes a state of naturally lubricated arousal of the "mouth in the south."

- Often leads to related symptoms such as the snail trail.
"Turning a frown upside down is one thing.. How about getting a slippery smile with your jaw out of a dry maw?"
"I got a branch of hickory and she's got a smile that's slippery!"
by Teen-stash January 24, 2014
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