speeyack Share definition Flag (N) Vomit. (V) To vomit; hurl. "I would rather spend a few hours feeling wretchedly ill than take ten minutes to speeyack and have done with it." -Sarah D. Bunting, Tomato Nation speeyack by Jeannette May 17, 2005 0 0 Get merch Get the speeyack mug. Buy Now — $32.95 See more merch