ruby-lipped mau mau Share definition Flag Derogatory word for African-Americans, used primarily in San Antonio, TX by Mexican-Americans. Oye, I hear your sister is going out with that ruby-lipped mau mau. ruby-lipped mau mau by Cleo Chase June 21, 2005 0 0 Get merch Get the ruby-lipped mau mau mug. Buy Now — $32.95 See more merch