Five of a Kind
Five of a kind is five cards of the same rank, possible only with wild cards or more than one deck.
The simple explanation
Five of a kind needs five cards of one rank. A normal deck has only four of each rank, so the hand is impossible without a wild card, a joker or more than one deck. When it exists, it beats every other hand.
A closer look
The hand is the highest ranking in games with wild cards, such as deuces wild. It does not appear in standard hold'em or Omaha. In a game with a joker, four aces and the joker make five aces.
A practical example
In a deuces wild game, a player holds K♥ K♦ K♣ 2♠ 2♥: three kings and two wild deuces make five kings.
Full explanation
Five of a kind is five cards of the same rank, possible only with wild cards or more than one deck.
Five of a kind means five cards of the same value. It is a hand possible only in games with wild cards, or in games with more than one deck.
It defeats all other hands, even a straight flush.
Since a normal deck has four of each rank, the hand cannot exist in standard hold’em.
In deuces wild, the wild twos make five of a kind possible.
Alternative spelling: five-of-a-kind, 5 of a kind, 5-of-a-kind