D'oh!

"D'oh!" is an exclamation popularized by the character Homer Simpson from the TV show *The Simpsons*. It is used to express frustration, regret, or realization of a mistake, often immediately after an error or blunder. The phrase captures a humorous, relatable acknowledgment that something went wrong due to a poor decision or unintended outcome. Over time, "D'oh!" has become a widely recognized way to react to simple errors or mishaps, conveying both surprise and mild annoyance without needing further explanation.