Labia - usually when it’s excessive. Synonyms are meat flaps, beef curtains, roast beef deluxe, etc.
by Tunnelbuddies March 2, 2019

Did you hear about John taking a bloke home the other night?
Yes, I know he's always been a bit of a cat flap.
Yes, I know he's always been a bit of a cat flap.
by tropical October 17, 2007

by R. cook November 10, 2004

The under belly of all cats. There are usually two distinct flaps between their back left and right legs. They are noticeable while strolling. They usually become larger as the cat gets older and/or fatter.
Caroline fed her young cat Seymour so frequently that his cat flaps eventually became so large that they dragged on the floor whilst walking.
by planetsleeep January 28, 2010

by badgerroy June 28, 2008

Ever seen toy story? You remember Sid? Now think of him but more bisexual. Aaaannnnndddd that's a cat flap
by AmazeeHD March 7, 2017

The anus, especially in reference to anal sex.
Origin: picture the female perineum in the missionary position, and note the orientation of the vulva relative to the anus. Observce the similarities with the typical orientation of the front door and the cat flap in a house.
Other parallels regarding size and ease of human access further strengthen this metaphor.
Origin: picture the female perineum in the missionary position, and note the orientation of the vulva relative to the anus. Observce the similarities with the typical orientation of the front door and the cat flap in a house.
Other parallels regarding size and ease of human access further strengthen this metaphor.
by EugeneUK September 28, 2008
