What is a monkey in blackjack?

In the game of blackjack, a "monkey" is a slang term used to refer to any card with a value of 10 (10, Jack, Queen, King) in the deck. These high-value cards are crucial in the game of blackjack as they increase the chances of getting a strong hand, such as a blackjack (a hand with a total value of 21). Monkeys are often considered lucky in the game of blackjack and are highly sought after by players.