willbo Share definition Flag Someone who bails on friends, possibly multiple times, when they want to see the hobbit because they have a massive pine cone in their twat. Guy1&2: Wow, our newb of a friend bailed on the hobbit again. Guy3: What a willbo! willbo by bigdickswagger December 26, 2014 0 0 Get merch Get the willbo mug. Buy Now — $32.95 See more merch