Bang on Definition 1 of 3Pro Tip 1/3Informal Usage Used in casual conversations among friends or on social media, not in formal situations. Mate, your guess about the winner was bang on! Pro Tip 2/3Stress on Accuracy Emphasizes that something is completely correct or accurate. She predicted the outcome bang on. Pro Tip 3/3Avoid Overuse Use sparingly to maintain its impact when describing something exact or appropriate. I checked the figures, and they were bang on.