13 juin 2018 · The term likens the lips of the vagina (labia majora)—when elongated or stretched in some way—to fleshy, foldy drapery, like slices of roast beef. And so, of course roast beef curtains is a common form of this slang in the US. imgflip The term came into the public spotlight in late 2017 in a feud between hip-hop artists Azealia Banks and Remy Ma.