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Auto-blumpkin 

The act of fellating oneself whist simultaneously taking a deuce
"Why is Ian taking so long?"

"Dude, it's an auto-blumpkin yo"
Auto-blumpkin by automblumpkinitis January 19, 2008

auto blumpkano 

The act of giving oneself a blumpkin.
Did you hear about Matt last night? Heard he got so drunk he gave himself an auto blumpkano!
auto blumpkano by pigy_G December 15, 2010

Autoblumpkin 

A blumpkin that is given to oneself, usually while taking a shit. When you suck and/or masturbate your dick; waiting for the climax to push the turd out. Gives an extra sense of stimulation.
yo meehan, go give yourself an autoblumpkin in your moms bathroom.
Autoblumpkin by The Meehan October 17, 2009

Autoblumpkin 

When you're taking a shit, and you give yourself a blowjob at the same time.
"Last night I was taking a huge dump, right? So to ease the pain a little bit, I gave myself an autoblumpkin. Best shit ever.