A chain that you swallow and let run through you untill it exits your asshole, then you link the end that you are about to swallow to the part that has come out of your asshole. Now let the chain run through your digestive system in a loop.
by 83n R1t5c431 November 26, 2018
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Area between a womans vagina and anus.

Feminine version of gooch.
Female 1 : My chainus hurts.
Female 2 : Yup, Sex will do that to you.
by anonymous January 20, 2005
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