Its when you blow a load in a chick's ass and it drips down into the vagina, getting the chick pregnant.

you and a partner go to africa and get a monkey. when you get horny for eachother , take the monkey and disect its testicals from its body. the male can cover the nuts with his spirm and the female can suck it up her ass and shit it back out when its ready. when it comes out it will look like a dirt monkey nut sperm surprise.

Its when somebody looks crusty. Anaya