by Giggles T. Clown September 19, 2014
by Madball June 22, 2012
A Sexual act where while having vaginal intercourse you attempt to slip your scrotum (the stump) into the vagina with the shaft (Or trunk).
Guy 1 : Hey man, I was banging this chick last night for the first time and I was trying to put my balls in her vag. along with my dick.
Guy 2 :Your an idiot, You can't just pull a stump grinder on a girl, on the first date!
Guy 2 :Your an idiot, You can't just pull a stump grinder on a girl, on the first date!
by WootALoot December 14, 2009
by desert ace, stroker ace May 14, 2011
by LaBelleEstelle March 03, 2014
by theantonbomb August 03, 2009
A Montana stump grinder is a sexual act. It begins with a man and a woman, or a man and a man, and the giver takes rough grit sand paper, rolls it into a tube big enough for the receivers penis to fit through, and stimulates the penis with it, similar to a hand job.
"You would not believe how sore I am from the Montana stump grinder I got last night. It was the best I've ever had!"
"Ask your lover for a Montana stump grinder if you like to party."
"Ask your lover for a Montana stump grinder if you like to party."
by Blownchevy1996 January 28, 2017