When a female with a boyfriend or husband or any significant other chooses another man outright without any second thoughts. Cheating without the need to creep.
It's like saying to someone "your slip is showing" .....the moment that you see a woman just starting to get irritated or upset....usually jealousy is involved.....
Hey, Babe....I was just getting that girl's phone number in case we ever need a dog sitter.....by the way, your bitch is showing!!