flosstitute Share definition Flag One who advocates Free, Libre and Open Source Software but uses nonfree or closed-source software. That hypocrite pretends to be a free software zealot, but he runs Windows for the computer games. What a flosstitute! flosstitute by gnominous January 20, 2006 0 0 Get merch Get the flosstitute mug. Buy Now — $32.95 See more merch