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A sexual position in which multiple participants engage in anal intercourse in such a way as to create a closed loop.

The resulting shape resembling a polygon with as many sides as there are participants.
Ste: "The rest of the rugby team are coming over later, but I've got no idea what to do for entertainment."
Tim: "More than five of you? You could always get a Bumagon going."
by Megalon3k July 23, 2016
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