Word Origin & History
slur"deliberate slight," 1609, from dialectal slur "thin or fluid mud," from M.E. slore (1440), cognate with M.L.G. sluren, M.Du. sloren "to trail in mud." Related to E.Fris. sluren "to go about carelessly," Norw. slora "to be careless." The musical sense (1746) is from the notion of "sliding."