What is the meaning of Spats?

A stiff legging worn over the instep and ankles of a shoe.

A similar device for horses.

Long hair on front of lower legs of heavier horses (over the hooves), especially draft horses, notably the Clydesdale breed.

form-fitting shorts covering the waist to mid- or lower thigh usually worn for athletic situations, compression shorts

plural of spat

third-person singular simple present indicative of spat

Source: wiktionary.org