Fluke/fluːk/ Definition 1 of 4Pro Tip 1/3Unpredictable Luck Emphasizes events or successes that happen by chance and are unexpected. Winning the lottery is a fluke for most people. Pro Tip 2/3Not Skill-Related Used when success is not a result of one's abilities or efforts. His hole-in-one was a fluke, he's usually a poor golfer. Pro Tip 3/3Often Downplayed Could be viewed negatively, as it can undermine someone's perceived effort or skill. Everyone said it was a fluke when I aced the test.