When a guy cums in a girl after doggie style sex, he keeps his cock in her and they walk as a team to the bathroom so the cum doesn't leak all over the bed sheets. The penis keeps the cum in the pussy while the legs operate the train.
Jen: Oh my god, that is so much cum, I just changed my bed sheets!
Joe: No worries babe, I'll give you a Filly Train Ride.
A purposeless interpretive dance involving finger-to-cheek pokes done by girls. This dance is aimed to further prove the dancers' inane and insignificant existence. It is uselessness at its worst.
Girl 1: Uhh, uhh break it down! Silly it, filly it!
Girl 2: Silly filly!!!!!
Girl 1: Bob! Do the silly filly!
Bob: (walks away)
A dance done by stupid girls which involves one finger poking the left side of face and another finger poking right side of face while simultaneously screaming "Silly! Filly!" in a high-pitched shrill voice. Usually done by people with the need to advertise their stupidity.
girl one: "OMG!" A bird!
girl two: "This calls for the Silly Filly!"
A word used mostly by freshmen. A feeble attempt to mean the same as the word "filthy". Ultimately, it doesn't mean anything. Use this word when you are trying to sound cool but just can't seem to make it work.