When a woman doesn't wear any underwear, especially if her pussy is somehow exposed while not wearing underwear. You cannot call it going Commando like when a man doesn't wear underwear. It's called that because your dick is somewhat exposed to the elements.
"Dude, when the wind just blew a minute ago this hotties dress went up high and she wasn't wearing any underwear...Cat's out of the Bag!!"
by Shame420 March 10, 2022
Person X: Has the secret/rumour gotten around yet?
Person Y: Dunno, Schrödinger's Cat's in the bag
Person X/Y once rumour has gotten around: Guess Schrödinger's Cat is out the bag now
Person Y: Dunno, Schrödinger's Cat's in the bag
Person X/Y once rumour has gotten around: Guess Schrödinger's Cat is out the bag now
by The Daft Knee February 07, 2022