japanaut Share definition Flag a japanese astronaut Idiot 1 : "If american's are astronauts, and the russians are cosmonauts, then what are the japanese? " Idiot 2 : "Japanauts, Idiot #1." japanaut by Del & JJ May 7, 2005 0 0 Get merch Get the japanaut mug. Buy Now — $32.95 See more merch