Tabby cat
A tabby cat, or simply tabby, is any domestic cat (Felis catus) with a distinctive M-shaped marking on its forehead; stripes by its eyes and across its cheeks, along its back, and around its legs and tail; and characteristic striped, dotted, lined, flecked, banded, or swirled patterns on the body—neck, shoulders, sides, flanks, chest, and abdomen. The four known distinct patterns, each having a sound genetic explanation, are the mackerel, classic or blotched, ticked, and spotted tabby patterns.
"Tabby" is not a breed of cat, but a coat pattern found in many official cat breeds, and is very common among the general population of mixed-breed cats around the world. The tabby pattern occurs naturally and is connected both to the coat of the domestic cat's direct ancestor and to those of their close relatives: the African wildcat (Felis lybica lybica), the European wildcat (Felis silvestris) and the Asiatic wildcat (Felis lybica ornata), all of which have similar coats, both by pattern and coloration. One genetic study of domestic cats found at least five founders.