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sexual act when 2 partners join assholes and one partner takes a shit into the other partners asshole then that partner shits it back into the other's asshole. Sharing the same shit multiple times.
Harry - Did you hear what Kenzie and Tessa did last night?

Dick - No, what did they do?

Harry - The did the Backwards Brown Bear last night while watching Brazilian fart porn.

Dick - That"s fucking haggard.
by happy panda 92 August 20, 2011
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