Masu'o Share definition Flag Masu'o in japanese means fruitfull or furtile What was that one guy's middle name, the one with the awesome fro? oh yea it was Masu'o He's as i like to call it "fruitfull" Masu'o by Tallatsu September 30, 2008 0 0 Get merch Get the Masu'o mug. Buy Now — $32.95 See more merch