Torbie is a coat pattern, not a breed: the name blends tortoiseshell and tabby, and a torbie shows both at once. The coat combines a tortie's patches of black-based and orange-based color with tabby stripes, swirls or spots running through it, often along with the classic M on the forehead. Variations include brown, dilute blue-and-cream and silver torbies, and a torbie with plenty of white is sometimes called a caliby. Like other tortoiseshells, nearly all torbies are female, because the orange color gene sits on the X chromosome.
Most torbies at shelters are domestic shorthairs or longhairs, though the pattern turns up in many purebreds as well. Torbies are sometimes said to blend tortie spunk with tabby friendliness, but there is no good evidence that coat color shapes personality. Adopters will meet torbies of every temperament, so the individual cat matters most.