The idiom “own goal” comes from sports, where a player accidentally scores a goal for the opposing team. In everyday language, it means making a mistake that harms your own interests or team. For example, if someone in a business makes a decision that ends up hurting their own team’s progress, a colleague might say, “Well, talk about own goals!” This idiom highlights how a mistake can backfire and cause problems for the person or group that made it. | Learn Laugh and Speak