Noun. Plural -e. Late 19th century.
[German, lit. 'fish for frying'.]
A girl in late adolescence, a teenage girl.
In Germany, backfisch is an old-fashioned term for a young girl that is no longer a child but isn't yet a woman. From talking to native Germans, it would seem that backfisch, in German at least, doesn't have a pejorative connotation; rather, it stresses her innocence, even naivety, and thus might even be considered quite flattering.