Up card is a term used in casinos that refers to the dealer’s face-up card. As a term, up card is most often used in blackjack since one of the dealer’s cards is going to be an up card, while the other one is going to be a hole card.
An up card can also be used in some stud variations of poker. However, in this case, a face-up card will be dealt to the player, allowing other players to see the card.
Keep in mind that there is a big difference between up cards and community cards. Namely, while both community and up cards are dealt face-up and everyone can see them, the up card in stud or blackjack can be used only by the person the card belongs to. When it comes to community cards, they can be used by every player at the table to make a winning hand.