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.
by The Meehan October 17, 2009
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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.
by Officer Dickhead March 13, 2016
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