tuxedo
n.— «Late for a dinner appointment, she cut through an alley off Belmont Road NW in Adams Morgan and was surprised to see a dozen black-and-white cats—tuxedos, as they are called.» —“Stray but Not Forgotten” by Sue Anne Pressley Montes Washington Post Aug. 31, 2007. (source: Double-Tongued Dictionary)
Not every black and white cat (bicolor) is a “tuxedo” — only those whose entire back, shoulders, and hips are solid black to make a jacket. Diagrams at: http://www.messybeast.com/bicolours.htm