"Fleek" is a slang term that originated in the early 2010s, primarily used to describe something that is perfectly executed or looks great. It gained popularity through social media platforms, especially after a viral video in which a young woman used the term to describe her eyebrows. Since then, "on fleek" has been applied to various aspects of style, beauty, and performance. The term is often associated with the beauty and fashion industries, where it signifies a high standard of appearance or quality. While it initially focused on personal grooming, "fleek" has expanded to encompass anything that is considered impressive or well-done, reflecting a broader cultural trend in youth slang.