Top definition
Playful masterbation while taking a bountiful dump.
Brent had stayed up all night eating burritos, the next morning he performed a Mulumpkin before his shower.
by Sloozeberry October 11, 2008
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug