FOSS-sexual Share definition Flag A person who gets horny at the sight of a penguin or free and open-source software. Person: Person2 uses Firefox. Me: Of course he does, he is a FOSS-sexual. FOSS-sexual by IAmOZRules March 27, 2022 0 0 Get merch Get the FOSS-sexual mug. Buy Now — $32.95 See more merch