Read the dictionary definition of boodle. All definitions for this word.
1. a gambling card game in which chips are placed on the ace and king and queen and jack of separate suits (taken from a separate deck); a player plays the lowest card of a suit in his hand and successively higher cards are played until the sequence stops; the player who plays a card matching one in the layout wins all the chips on that card
2. informal terms for money
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Merriam-Webster definition of boodle