funny inch Share definition Flag The caustic name used to refer peanut. People pretend to say fanny itch, but really say this. And then make fun of others for mishearing. "You said funny inch, not fanny itch...dick." says peanut funny inch by Peanut June 10, 2004 0 0 Get merch Get the funny inch mug. Buy Now — $32.95 See more merch