nifty ten fifty Share definition Flag adjective; something or someone that is cool. a different word to use besides awesome, cool, or chill. Jacqueline: Did you see those new shoes I got? Shelby: Yea! They are nifty ten fifty! nifty ten fifty by supershelbs August 18, 2011 0 0 Get merch Get the nifty ten fifty mug. Buy Now — $32.95 See more merch