Flukes are flat, leaf-shaped structures found on the bodies of certain animals, particularly in the animal kingdom. They are often associated with parasitic worms, which can live inside the bodies of hosts like fish or mammals. These flukes attach themselves to the host's organs, where they can absorb nutrients and reproduce. In a different context, the term "fluke" can also refer to an unexpected stroke of luck or a fortunate accident. For example, if someone wins a game by a surprising move, it might be called a fluke. This usage highlights the idea of chance playing a significant role in outcomes.