Is derived from "Blumpkin" where you receive fellatio while defacating. However, a Rumpel Blumpkin is when you receive fellatio in a the same bathroom stall or toilet as somebody who is defacating.
I took this chick to the bathroom, but Joey was already taking a dump, so she straight gave me a Rumpel Blumpkin while he watched.
by Pico Rivera October 9, 2016
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