A fish with a blue back and silvery sides and underparts, Micromesistius poutassou (family Gadidae), common in the eastern North Atlantic and the Mediterranean; (also) (in full "southern blue whiting") the similar fish M. australis of the Southern Ocean; also called poutassou.
Origin
1920s.
Definition of blue whiting in US English:
blue whiting
noun
A fish with a blue back and silvery sides and underparts, Micromesistius poutassou (family Gadidae), common in the eastern North Atlantic and the Mediterranean; (also) (in full "southern blue whiting") the similar fish M. australis of the Southern Ocean; also called poutassou.