Top Definition
The act of stuffing your testicles into someones asshole. A relatively new fetish, it is also done to reclaim much needed body warmth during periods of hypothermia.
After falling through the ice during my last ice fishing trip with Justin Beiber, he graciously allowed me to stuff my hairy beanbag into his ass to avoid dying of hypothermia. I owe him my life for Rectum Bagging him on the ice.
by A Bustle in Your Hedgerow November 05, 2011

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