ˌLady ˈBountiful noun derogatory
a woman who wants to be considered rich and generous and who does a lot of charity work or gives money to poor people, but behaves as if she thinks she is better or more important than them:
She likes to think she's Lady Bountiful.

[TahlilGaran] Dictionary of Contemporary English ▲

Lady Bountiful
a woman who enjoys showing people how rich and kind she is by giving things to poor people.
I've got a lot of clothes that they might make use of but I'm worried they they might see me as some sort of Lady Bountiful.

[TahlilGaran] English Idioms Dictionary ▲