noun
minor actress; bit-part actress; female extra
Dated colloquial term for a young actress with a small or walk-on role in film or TV. Related to わんさ (many, in crowds), suggesting a crowd of minor actresses.
See also: わんさ
彼女はまだわんさガールで、セリフは一言だけだった。
She was still just a bit-part actress and had only one line.
昔の映画では、わんさガールが大勢エキストラで出ていた。
In old movies, many female extras appeared as わんさガール.