bitlethfay Share definition Flag Bitlethfay is the word that your phone autocorrects Birthday to. I tried to wish my sister a happy birthday, but my phone autocorrected it to happy bitlethfay. bitlethfay by Timmy Tammy Time October 28, 2017 0 0 Get merch Get the bitlethfay mug. Buy Now — $32.95 See more merch