Parisian pass is often performed in crowded bars. The passer touches a person to let them know he needs to get through but allows his hand to linger longer than necessary. The maneuver is often used as a subtle way to flirt.
Girl 1: I don't think he's interested in you.
Girl 2: But he just gave me a Parisian pass on his way to the bar...
Girl 1: Looks like you've found your guy for the night!