To sleep with someone else's girlfriend!
To pinch or steal a beautiful cat or kitten.
"Hey Glenn why don't you go up to Miss Conway and give her a pussy pinch, I bet she will go wild for it!"
Donna went up to her Principle and said, "That dyke Tina just gave me a pussy pinch, I wanna report her ass for sexual harassment." The Principle replied, "And you didn't get anything from it?"
"Did you hear Tony did a pussy pinch with Matt's girlfriend last night!"