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When the top of the crack of someone's huge ass can be seen because of low-waisted pants or shorts, and the gap is so wide or large that a parcel or large envelope could fit. Not to be confused with Coin Slot, a much smaller crack that accommodates change.
In the parking lot today at Wal-Mart I saw an enormous woman clammer off of her mobility scooter and load her groceries into her busted-ass minivan. She was showing off her Mail Slot when she slid the door closed to head back to the trailer park. The gap must have been four inches across.
by Chef Dick August 10, 2009
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Oct 30 Word of the Day
A trick played on a fellow athlete where the open hand smacks the target's testicles with the knuckles in a sharp, wrist flicking motion.
"Dude, I sack tapped Brandon, and now he has the whole team trying to sack tap me"
by Chris M July 07, 2004
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