hippididditydoo Share definition Flag an exclamation made when something is waaaaay awesome and deserves something better than "yay" or "hooray". "DUDE! It's international 'hug a vegan' day!" "HIPPIDIDDITYDOO!!!!" hippididditydoo by neyj April 29, 2009 0 0 Get merch Get the hippididditydoo mug. Buy Now — $32.95 See more merch