sixfivian Share definition Flag six-five-ian (n.) someone who is 6 feet, five inches tall. Generally awesome at everything in life. "Hey theres some sixfivians Mike and Dillon being awesome, I wish i was as cool as them." sixfivian by DJHa March 22, 2010 0 0 Get merch Get the sixfivian mug. Buy Now — $32.95 See more merch