vance
A sexual procedure wherein a man inserts his index and/or middle finger(s) discretely into a woman's vagina while other people are in the room; all of which are completely oblivious to the sexual actions occuring across the room.
Man1: Did you hear about so-and-so and what's-her-face last Friday night?

Man2: No, what happened?

Man1: So-and-so totally 'vanced' her at that-one-guy's house!

Man2: No way!

Man1: Oh yeah, he totally 'vanced' her.