/chub/ , n. , pl. ( esp. collectively ) chub , ( esp. referring to two or more kinds or species ) chubs .
1. a common freshwater fish, Leuciscus cephalus, of European waters, having a thick, fusiform body.
2. any of various related fishes.
3. any of several unrelated American fishes, esp. the tautog and whitefishes of the genus Coregonus, of the Great Lakes.
[ 1400-50; late ME chubbe, of obscure orig. ]