a sexual act in which a man or woman get on their back while a line of men ejaculate on them, but this important: they have to go over the man or woman like their a train going over them and the gravy is obviously the semen.
by the train wrecker February 12, 2009

N. (grAH-vee rayn-bO)
The fecal mustache that is created when a person performs fellatio on their partner after their partner has pitched during anal sex (Ass-to-Mouth).
Although possible in heterosexual encounters, the term Rainbow indicates that it is primarily a homosexual term.
The fecal mustache that is created when a person performs fellatio on their partner after their partner has pitched during anal sex (Ass-to-Mouth).
Although possible in heterosexual encounters, the term Rainbow indicates that it is primarily a homosexual term.
by Ribaldo Givera July 26, 2011

by MyXstery January 15, 2022

n. Aussie surfer term for a special thunderous wave that comes at the end of a good day of banging about on the woolies.
.......................................
.......................................
What you reckon? Time to get home and grease the koala?
No, no! Hang about Fred! I think I see a gravy wave forming.
No, no! Hang about Fred! I think I see a gravy wave forming.
by gnostic3 November 3, 2016

by obangomcdoogle August 18, 2020

by jinglebot January 13, 2008
