fag-a-tron Share definition Flag The combination of 3 or more penis's in a gay mans mouth, with its power combined, it creates a fag-a-tron. A gay man named Rebel opens his mouth and yells,"Fag-A-Tron ASSEMBLE". fag-a-tron by Eric Lalicker September 7, 2007 Get the fag-a-tron mug.