an Atlantic food fish, Cynoscion regalis, of the croaker family.
2.
any of several other Atlantic fishes of the same genus; sea trout.
Origin: 1795–1805, Americanism; < southeastern New England Algonquian, orig. pl. (cf. obs. E dial. chickwit,squit, etc. < sing. of the same word, c. Mohegan (E sp.) cheegut)
weak·fish (wēk'fĭsh') n.
pl.weakfish or weak·fish·es A marine food and game fish (Cynoscion regalis) of North American Atlantic waters. Also called squeteague.
[Obsolete Dutch weekvis : week, soft (from Middle Dutch weec; see weik-2 in Indo-European roots) + Dutch vis, fish (from Middle Dutch).]