n. One of several different fishes of the family Scombridæ, and especially any fish of the genus Scomber.n. The bonito, Sarda chilensis.n. The common mackerel of next to the smallest of the four commercial sizes (large, seconds, tinkers, blinks), which are supposed to indicate respectively four, three, two, and one years of growth.n. (See also frigate-mackerel.)To fish for or catch mackerel; go on a mackerel voyage.n. A pander or pimp.n. In Australia, a fish, Scomber antarcticus, Castln., similar to the chub mackerel, Scomber Japonicus, Houttuyn; in New Zealand, Scomber australasious, Cuv. and Val.