" In June 2014, a sixteen-year-old teen named Peaches Monroee made a six-second video in which she called her eyebrows “on fleek,” meaning “good” or “on point.” In November, just five months after Monroee posted her video, nearly 10 percent of all Google searches worldwide were for “on fleek. "

― Kory Stamper , Word by Word: The Secret Life of Dictionaries