Extratranstrestrial Share definition Flag (Adj.) A homosexual alien being, mostly found in the outer tri-band galaxy many many light years away. Like oh my gosh, your man-friend is like a total extratranstrestrial! Extratranstrestrial by zoochambi July 25, 2008 0 0 Get merch Get the Extratranstrestrial mug. Buy Now — $32.95 See more merch