MacMillan
When you jam your balls into a girl's butt while you're f***ing her, and then you do it again when you're butt-f***ing her. Like a total f***ing idiot.
My cousin did a MacMillan during lunch. The girl ran out crying.
I did a MacMillan in the back of the bus. The driver gave me a ticket.
My friend's dad did a MacMillan on his girlfriend. She f***ing screamed.