Gunnery Sergeant Hartman's description of a promiscuous girl, one that may or may not be a soldier's girlfriend prior to his military service. The term originated in the 1987 movie FULL METAL JACKET, and was used to describe the difference between a Springfield M-14 rifle used during basic training, and a female human, to the Marines being trained.
Gunnery Sergeant Hartman's dialog during the movie FULL METAL JACKET (1987):
(Shouting): "Tonight, you pukes will sleep with your rifles. You will give your rifle a girl's name. Because this is the only pussy you people are going to get. Your days of finger-banging old MARY JANE ROTTEN CROTCH through her pretty pink panties are over. You're married to this piece, this weapon of iron and wood. And you will be faithful."
(Shouting): "Tonight, you pukes will sleep with your rifles. You will give your rifle a girl's name. Because this is the only pussy you people are going to get. Your days of finger-banging old MARY JANE ROTTEN CROTCH through her pretty pink panties are over. You're married to this piece, this weapon of iron and wood. And you will be faithful."
by Scorpion Fangs December 14, 2007
adj., the word/s used to describe a rather maloderous emitions originating from a woman's private's parts
I got together with that honey from the coffee shop...boy, what a Mary Jane Rotten Crotch she turned out to be.
by Yeayuh March 24, 2005