feather boa
US /ˈfeð.ɚ ˌboʊ.ə/
UK /ˈfeð.ɚ ˌboʊ.ə/

1.
boa en plumes
a long scarf made of feathers, worn by women as an accessory, especially for formal occasions or costumes
:
•
She wore a glamorous red feather boa with her evening gown.
Elle portait un somptueux boa en plumes rouge avec sa robe de soirée.
•
The flapper costume was completed with a long string of pearls and a fluffy feather boa.
Le costume de flapper était complété par un long collier de perles et un boa en plumes moelleux.