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The act of shoving your testicles into the anus of a girl you are having vaginal intercourse with in the missionary position.

May also include shoving your testicles into the vagina while having anal sex.

Akin to an "Armstrong".
"Dude, I was doing this chick and I totally MacMillan'd her. Right in the backseat of my Miata!"
by TroubledIndividual March 26, 2009
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Aug 10 Word of the Day
Running for exercise and picking up trash you find along the way. It's good for the body, mind, soul, and environment! Started in Sweden but is making its way to the U. S.
It's nice out and the city is filthy. Let's go plogging!
by Another damn hippie. May 09, 2018
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