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noun, the buttocks gap

This is the interval between the buttocks.
He stared at her arsecrack as if staring at a masterpiece of nature.
by Tiago Zuhr July 29, 2008
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The source of various beautiful entities such as arsegravy, arsemonsters, and in the case of people with their heads lodged up their arses, chatter. This latter example can be summed up with the increasingly popular yet still underused phrase "chatting out of one's arsecrack".
We salute you almighty arsecrack, the symbol for all things good and pure. And if anyone disagrees, they are chatting out of their arsecrack!
by Jimmy Bob-Bob February 10, 2012
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