Tiddily Fuddily Share definition Flag Tiddily Fuddily, a word used to replace other words such as 'having sex' etc etc Axel: Oh look! They're having sex! Demyx: (0_o) Axel: No they're not! It's tiddily fuddily! Tiddily Fuddily by DeguchiNashi September 27, 2011 0 0 Get merch Get the Tiddily Fuddily mug. Buy Now — $32.95 See more merch