Apple-knocker Share definition Flag A hay shaker, hick, or gobby from the country. A country cousin, an unlettered rube. Get a load of that apple-knocker trying to mail a letter in the fire alarm box! Apple-knocker by Bob Proczko October 16, 2006 0 0 Get merch Get the Apple-knocker mug. Buy Now — $32.95 See more merch