Porta Blumpkin
The act of getting a blow job while taking a shit on the toilet inside a Porta-Potty. Very similar to the plain BLUMPKIN. Just watch out for the blue water.
Why don't you come inside this porta potty and give me a Porta Blumpkin.
The Porta Potty Blumpkin
When one receives fellatio while defecating in a portable restroom or other rustic lavatory.
While at the Grateful Dead Concert, Hoover gave me The Porta Potty Blumpkin, also known as a hippie blowie shitbomb.