Where the labia (womans lips :) ) hang low and create a flap.
I was watching a tv program where a woman had saggy lips, it reminded me of a cat flap.... And as another word for the vagina is pussy (cat) and people call the lips fanny flaps I put two n two togther.... VOILAAA! Cat flaps!!
"Get you cat flaps out!!l
The old lady bent over to reveal her cat flaps
The womans cat flaps whistled in the wind
by little_l September 26, 2011
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Labia - usually when it’s excessive. Synonyms are meat flaps, beef curtains, roast beef deluxe, etc.
My girl wanted to have sec this morning but her cat flaps was rank!
by Tunnelbuddies March 2, 2019
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Cat flaps = empty tits

Cellophane Cat Flaps = extremely empty tits

The tits are literally just skin and the skin is so thin it clings to the chest like Cellophane

These are not flat chested tits these are ones buoyant decent sized boobs that have deflated through child bearing and breast feeding
Those aren't just cat flaps they are Cellophane cat flaps ... like seriously empty. They could not be any emptier
by VeryVisionary July 7, 2023
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A euphemism for anuses, with the term often used to describe the process of anal sex.
Frenchy had an aversion to pussy, so he would prefer to stick one in Carol's Cat Flap.
by Marco Nee February 26, 2012
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Guy: "Ive lost my keys!"
Guy: "Its going to be very hard getting in this cat flap"

(Later on)

Guy: "This is moist but atleast I have my keys!.."
by The mysterious stranger March 23, 2010
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