Definição e Significado de "[cry] foul"

What is the origin of the idiom "cry foul" and when to use it?

The origin of the idiom "cry foul" can be traced back to sports, specifically to the game of cricket. In cricket, players would shout "foul" to indicate that a ball was not played according to the rules or that an opponent had violated the fair play standards. It can be used in various contexts and occasions, including sports, politics, business, relationships, or any scenario where there is a perceived violation of rules, ethics, or fairness.