A verb, meaning to score a 99% on a test or exam or otherwise miss getting a perfect score by one point. A common source of frustration for nerds everywhere, especially when there is any sort of incentive for getting a perfect score, such as a pencil.
Person 1: "Hey bro, what'd you get on that test?"
Person 2: " I totally dhaval-ed. Look at this 99%."
Person 1: "Awwwww man that totally sucks! You were so close to getting a 100!"