The term 'King Beaters' is a phrase used to describe a group of people who are skilled at playing card games, particularly those involving the Ace of Spades. The crossword solutions for this term are ACES, which is an acronym for the four suits in a deck of cards: Clubs, Diamonds, Hearts, and Spades. These four suits are often referred to as the 'ACES' of the deck, and thus the term 'King Beaters' is used to describe those who are skilled at playing card games with these suits.