Time ostenibly spent in the bathroom (derivative of "to flex" = Pooping) but more to the point spent at other pursuits - video solitare, reading the newspaper, collecting your thoughts, jerking off, or all of the above - while in the stall and/or bathroom. Occurs daily worldwide.
Dave stood, grabbed the crossword puzzle and headed for the bathroom. "I'm going to take some flex time," he announced
by unclebustter May 10, 2006