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The arch of the back when you fucking from behind. Perfect to pull out and jizz into.
"So I was fucking this girl and she had the perfect cum cavern"
"Did you cum?"
"Hell yeah!"
by cumcavern1 March 13, 2017
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2
the cunt of a slut. a huge open space with all sorts of cum stalagmites and stalactites and shit. some grimy shit right there
your grandma's such an old ho she's probably got a cum cavern
by cs2toktos October 02, 2011
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