Aoxomoxoacillin Share definition Flag An antibiotic prescribed to Grateful Dead fans for infections resulting from recreational drug use. That needle track in my left arm got infected, so the doctor put me on a course of Aoxomoxoacillin. Aoxomoxoacillin by crowley4 December 6, 2009 0 0 Get merch Get the Aoxomoxoacillin mug. Buy Now — $32.95 See more merch