Meaning of rough fish in English:

rough fish

Pronunciation /ˈrʌf ˌfɪʃ/

noun

  • With plural agreement. Fish of inferior quality, especially those of a species considered too coarse or ill-tasting for general consumption, or unsuitable for sportfishing, and hence formerly caught or bought chiefly by the poor; sometimes opposed to game fish. Also in singular: a fish of this sort.

Origin

Mid 18th century (in an earlier sense). From rough + fish.