Top definition
The eating, drinking, or ingesting of something by way of the anus.

Sometimes the insertion (but not consumption) of objects into the anus may also be referred to as buttsumption.

A term that usually accompanies anal sex with a very loose anus. The extra flaps of moist skin form a seal around the penis, acting as a plunger and sucking it inwards and onwards, deeper into the abyss.

The butt seems as though it is swallowing the penis whole.
Mark: "Hey dude, you ever had a beer enema? Gets you drunk like mad crazy!"
Paul: "Think I'll pass on that one."

Hannah: "Stuffing my bum with acorns."
Jack: "I don't think those are meant for human buttsumption."

Tom: "Hey Bro, heard you got anal from Alice last night?!"
Jerry: "Yeah. Too bad her anus was loose as a clown's pocket. Her butt almost swallowed me whole!"
Tom: "Damn, dude. Sounds like a case of penile buttsumption!"
by Angrywank March 17, 2013
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