As hard as a goat's knee Share definition Flag Something so hard/tough, like a lump of stale bread or an oul' scone, you can't hardly bite it. Jayz lads, thon bun's as hard as a goat's knee! As hard as a goat's knee by Wingwah March 28, 2019 0 0 Get merch Get the As hard as a goat's knee mug. Buy Now — $32.95 See more merch
