A "fiddle" in the context of cheating refers to the act of manipulating or altering something to gain an unfair advantage. This term is often used in various settings, such as sports, games, or financial transactions, where individuals may change rules or outcomes to benefit themselves. The term can also apply to situations where someone might misrepresent information, such as in accounting or gambling. Fiddling undermines fairness and integrity, leading to distrust among participants and potentially serious consequences for those involved.