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1.
The flaps of skin surounding a woman's vagina.
Her beefy curtains were so big they hung out of her thong.
by Sean S. December 13, 2003
 
2.
beefy curtains are the 'fanny flaps' of a fat woman. They are beefy, because they are large/fat...and they are curtains as they hang over the entrance.
"You've got too much cheese around your beefy curtains.
by Matt.L October 02, 2003