Gettin' on it Share definition Flag A saying which started in Manchester during the era (or e-ra), meaning to get drunk excessively and/or consume drugs. You gettin' on it tonight? There's a load on at the Hacienda! Gettin' on it by Machester88 March 3, 2014 0 0 Get merch Get the Gettin' on it mug. Buy Now — $32.95 See more merch