Similar to lesbians scissoring, except with your bum.
I.e. to rub bumholes together for pleasure.
Marcus: Hey Andy, did u hear matt and joel bum scissoring last night?

Andy: Yeah man, they were rubbing anus's and moaning like a pack of wildabeasts. Wildabeasts do that i guess.

Marcus: Oooh yeah.
by CheesusCrustFUCKYEAH March 11, 2011
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