A complete failure, especially in terms of a performance or event. The movie was a flop at the box office, earning far less than expected.
A heavy, loose, and often noisy fall or movement. With a loud flop, the fish landed back in the water.
A sudden or unexpected drop or decline, especially in value or quality. The stock market experienced a significant flop after the announcement.
In poker, the first three community cards dealt face up after the first betting round. He hit a full house on the flop.