Combination of a Blumpkin and an Upperdecker.

The act of receiving a blow job while taking a shit in the upper section of a toilet after taking the lid off.
After becoming bored with the typical Tuesday night Blumpkin, Andrej decided to spice it up a bit with the Blump-Upkin. Tuesday nights will never be the same!
by BlumpkinOrDie January 9, 2021
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