Rusi Share definition Flag Rusi is the surname given to select few (medical miracles) who posses freakishly enormous penis's. Dude his wiener hangs to his boots!!! He's gotta be a Rusi!! Rusi by JimRocketmanMorrison March 30, 2011 0 0 Get merch Get the Rusi mug. Buy Now — $32.95 See more merch