noun
robe décolletée; low-cut dress
A dress with a low neckline, typically for formal or evening wear. The term is a direct borrowing from French and is used in fashion contexts.
from French
パーティーにはローブデコルテを着ていくつもりだ。
I plan to wear a low-cut dress to the party.
Variant spelling with a middle dot; less common but still used.
Borrowed from French 'robe décolletée'.