I'm not exactly sure what used gravy is, but the concept apparent from the term.
It could be gravy that was on something, congealed, removed, and then put on another food item.
This stuff tastes like used gravy.
A whitish gelatinous DNA containing substance forcefully ejected from a man's penis during climax of the sexual act.
Jankins: I sprayed nut gravy all over her face!
Poombah James: You're the Schizz-rizzle-ba-dizzles, Matey
Jankins: And then I gave her a pearl necklace!
Poombah James: You should be a like a professional cake decorator, Baller!!
the wad of goo that ends up in a chicks panties after an atomic sized orgasm.
"I was amazed at the volume of thong gravy she deposited."
A woman's orgasm juice when thick.
When I was rubbing her cunt, I could feel her cunt gravy was as thick as glue
The name for pasta sauce in God's country.
Clem passed Bubba the red gravy to put on his noodles.
The foul smelling fluid that forms at the bottom of large quantities of garbage. It is formed from liquids that have been thrown out mixing in garbage cans or dumpsters.
Friend 1: Would you drink a cup of dumpster gravy for a million dollars.
Friend 2: I wouldn't drink it for ten million dollars.
When you fart but accidently have diarrhea in bed under the covers creating Blanket Gravy
My girlfriend accident had a blanket gravy moment in bed!