girdle, shapewear
Elle porte une gaine.
She wears a girdle.
C'est la gaine.
That's the sheath.
— Crazy Rich Asians (2018)
Tu veux dire, sa gaine ?
You mean, her sheath?
— Memories of Murder (2003)
Oui, c'était sa gaine.
Yes, it was her sheath.
Celle qui a été découverte avec une gaine sur la tête.
The one who was discovered with a sheath over her head.
C'est une gaine, patron.
It's a sheath, boss.
— Gramps Is in the Resistance (1983)