wtfits Share definition Flag An acronynm for "what the fuck is this shit". However, it is not used that often. Usually used when instant messaging. Also look at wtfiw <Coolio> wtfits <Kewlio> wtfiw wtfits by Alec the Great December 19, 2004 0 0 Get merch Get the wtfits mug. Buy Now — $32.95 See more merch