What is Macmillan?
1.
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!"
See
Random Words:
1.
(1)To preform an action, or display a behavior that contradicts your normal persona.(2)To unintentionally act like your under the influe..
