wtfsauce Share definition Flag Commonly used to put emphasis on the 'wtf' part of the sentence. Bill: Dude, did you see that hot girl hooking up with that ugly dude? Jim: WHAT?!?! WTFSAUCE?! wtfsauce by Primo331 October 31, 2007 0 0 Get merch Get the wtfsauce mug. Buy Now — $32.95 See more merch