One-eyed royals

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The King of Diamonds, a one-eyed royal
The King of Diamonds, a one-eyed royal

The phrase one-eyed royals is poker jargon referring to the Jack of Spades, Jack of Hearts and King of Diamonds. The terminology results from the depiction of the royal on the card being in profile, resulting in only one eye being visible.

Frequently used in home games of draw poker as wilds -- "One-eyed Jacks, the Man with the Axe" -- because these three cards are the only cards of differing rank and suit in a common deck that share an identifying trait.