Definitions by DeuceCracka

buttbate 

The act of violently shoving your thumb into your asshole and shitting as you do it, this is usually done for sexual pleasure. (Male or female)

Me: Dude, I just buttbated, it was amazing.
Billy: Does your thumb stink?
Me: (Sniffs thumb) FUCK YES! There's fucking shit all over my hand! I forgot to clean up I guess...

buttbate by DeuceCracka January 22, 2014