Trading someone's V card to someone else, typically done as a joke or to flex how many people you took a v card from
Person 1: OMG PERSON 2 HAS SO MANY V CARDS!?
Person 2: surprisingly yea, wanna trade some?
Person 3: I only have insert random name's...
Person 1: oh we are Trading V cards
Person 4: is that my v card... in someone else's hand...???