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.

Autoblumpkin by Officer Dickhead July 28, 2016

auto-blumpkin 

To suck yourself off while dropping a deuce. See blumpkin.

Everyday at 5:00 PM Tom gives himself a salary auto-blumpkin at work.

auto-blumpkin by milfhunter37 November 3, 2003

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