- Moggy is an English term for a mixed breed cat.
An example of a moggy is a cat that is not a purebred.
Original sense, early 19th century, is a term of affection for a calf or cow, which may have been transfered to cats under urbanization. Later 19th century meaning of â€œuntidy woman, slatternâ€. Alternatively, in Wigan, moggy traditionally applied to mice, not cats, and a cat was hence a moggy catcher, which may have been abbreviated to moggy.
Apparently not an abbreviation of similar-seeming mongrel, though perhaps from similar Old English/Proto-Germanic source; see mongrel for details.