noun. Like truthiness, but the slippery truth has been replaced with skanky family fun.
Real citation: “I just found out that Colin Farrell is in a movie of Home at the End of the World! I must have it! Okay, slight incestiness, but still! Such a gorgeous book - though I never got to finish it ;_; stupid library fines! *wants film*”
(June 10, 2007, Only Latin Can Save Mankind!, http://nengrelim.livejournal.com/)
Made-up citation: "Barfologists agree that incestiness is less gross than incest, yet grosser than your oozing cyst. That's not an oozing cyst? A thousand pardons."