noun
mannequin; fashion model; clothing demonstrator
Wasei-eigo from 'mannequin girl'. Refers to a young woman employed to model clothes for customers, often in a department store or boutique. Not a literal mannequin doll.
wasei-eigo (Japanese-coined English), from mannequin girl
デパートでマネキンガールが新作のドレスを着て歩いていた。
A mannequin girl was walking around in a new dress at the department store.
彼女は学生時代にマネキンガールのアルバイトをしていた。
She worked part-time as a mannequin girl when she was a student.