It means pussy lips.

stretched out and saggy vaginal lips. It is also refered to as a "shotgun blast" or an "exploded bubble gum bubble"

Big saggy pussy lips that can be brown or pink, and serves as a nice blanket for a cock on a cold wintry day.

Reference to a vagina that has very saggy lips that are comparable to beef, and curtains, hence the name beef curtains. Often occurs after a lot of sex.

The shanked out remains of the labia after being stretched like Play-Doh from an hour or so of jimmy-jam.

Very large and droopy, even pendulous, vaginal labia.

yet another synonym for the female genetalia, specifically the inner labia. Sometimes used in conjuction with "rainbow tint"--referring to the color gradation at the ends of sliced roast beef.(Abbreviation: curtain)(See baloney flap)

A girl whos vagina is similar to roast beef