That's a dead Share definition Flag That's a dead means the joke is not funny or the joke has no use or meaning any more 1. Brittany: Hey Sarah I just said to Jessica deez nuts , GOT EEEM!Sarah: 😑 That's a dead That's a dead by That's a dead October 9, 2015 0 0 Get merch Get the That's a dead mug. Buy Now — $32.95 See more merch