gaffooble-gunk Share definition Flag That yucky yellow stuff you get in your eyes when you wake up in the morning. eww I had conjunctivitis and my eyes were full of gaffooble-gunk! gaffooble-gunk by CookieThief August 11, 2010 0 0 Get merch Get the gaffooble-gunk mug. Buy Now — $32.95 See more merch