During sex, when you pull out and jizz all over your girlfriend's bare midsection. The contrast of skin and white gives her stomach a distinctive look.
My girlfriend is so hot. Last night I gave her a massive pumpkinpie.
This is when you are doing a girl from behind and you crap in your hand a reach around and smash the "mud pack" all in the girls face. This is an extreme Dirty Sanchez.
I was having my way with a gal the other night and gave her the ole mud pie.
When having anal sex with someone, the person on the pitching side does'nt pull out while the one on the catching side gets a moonpie. You know when you cum in a chick thats called a creampie? Well Moon = Butt.
"Dude she finally let me put it in her ass." "yeah bruh be sure to give her a moonpie"