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When either a man or a woman squats over the ass of another and shits on said ass and then proceeds to push the fresh shit into the others ass. After completing this task, the receiver then gets up and shits their feces and the feces of the shitter into the shitter's mouth.
Me and Nik were out in the back and he gave me the worst gravy train.
by L Sizzle January 23, 2008
Leaving a loaf of poo on the brim of the toilet seat rather than properly dropping the dung into the toilet.
To the janitors unpleasant surprise he had found toilet seat that had been gravy trained.

Jeffrey decided to cause mischief and was guilty of first degree gravy train.
by j kerian November 19, 2007
A train literally made of gravy.
Person one: Why is there gravy all over this platform?

Person two: Could have been a gravy train.
by Pak_1 July 30, 2005
someone who exploits someone else's sucess.
Billy is a total gravy train.
by cardinal_fan October 13, 2004
To get three strikes in a row during a bowling match. A takeoff of the well-known term "turkey" to describe getting three strikes in a row.
Sam said: "Three strikes baby! Who's riding the gravy train now?"
by Sticky Nicky April 18, 2004
A line of guys who enjoy the company of other men. A sort of leap frog of sex if you will. The man in the back is the pitcher and the person directly in front of him is the catcher... he is also a pitcher for the guy in front of him. The men alternate from a standing to bent position engaging is homosexual activity.
I walked into your dads room and saw him in the middle of the gravy trian smiling and laughing.
by UT fuckers February 14, 2005
Possibly the best band ever.
Whore, whore! Gravy Train's the living testament
by Adam November 16, 2004