What is the meaning of Mackerel?

Certain smaller edible fish, principally true mackerel and Spanish mackerel in family Scombridae, often speckled,

  1. typically Scomber scombrus in the British isles.

typically Scomber scombrus in the British isles.

A true mackerel, any fish of tribe Scombrini (Scomber spp., Rastrelliger spp.)

Certain other similar small fish in families Carangidae, Gempylidae, and Hexagrammidae.

A pimp; also, a bawd.

Source: wiktionary.org