Flop
The first three board cards, dealt face up together. Betting on the flop means the round of betting right after those three cards are dealt.
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Example
The flop comes K♠ 9♦ 4♣, and the players still in bet again: that is betting on the flop.
Also Written
the flopflopsflopped
Related Words

Quads is for adults, 18 and over. It teaches with play chips only: there is no real money, ever.