new joint Share definition Flag Noun. A 'new joint' is something better than what you smoked, bought, ate, wore, or got laid by in the past. It's anything a cut above. "Got me a 6-cylinder 'new joint'" "This outfit is a 'new joint.'" new joint by goldielucks January 11, 2006 0 0 Get merch Get the new joint mug. Buy Now — $32.95 See more merch