Willin Fillin Share definition Flag (n.) a property of a word that makes it very hard to pronounce. You can see the willin fillin in the word "willin fillin" because of the i and l characters' similar appearance. Willin Fillin by Bowler - PKP September 12, 2011 0 0 Get merch Get the Willin Fillin mug. Buy Now — $32.95 See more merch
