Sim Fag Share definition Flag A person who works in the simulation or 3D field. Generally an artsy fartsy apple loving type. Mike went to Starbucks to work on his 3D model on his Mac Book Pro. Call that Sim Fag on his iPhone. Sim Fag by FrankBean April 17, 2010 0 0 Get merch Get the Sim Fag mug. Buy Now — $32.95 See more merch