spotted weakfish spot·ted·weak·fish uncommon noun 1. weakfish of southern Atlantic and Gulf coasts of United States Synonymsspotted weakfishspotted sea troutspotted squeateagueCynoscion nebulosus Related words Broader terms sea trout Parts Cynoscion Part of weakfish WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.