back·fisch \ˈbäkˌfish\noun (pluralback·fische \-shə\) Etymology: German, literally, fish for baking or frying, from backen to bake, fry (from Old High German backan) + fisch fish, from Old High German fisc — more at bake, fish : an adolescent immature girl < his family … two grown-up gawky sons, and a backfisch daughter — A.L.Mikhelson >