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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."
by Blownchevy1996 January 27, 2017
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Sep 14 Word of the Day
Micro marriging is when your partner manages your personal day-to-day tasks with you much like a Micro Manager at work.
Wife: “Have you put the sheets out to dry and put the towels on?”
Husband: “Yes. You know I am a grown adult also used to live alone so you do not need to micro marrige me”
by Thomas Maddocks March 16, 2018
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