Lady Bountiful
/ˌleɪdi ˈbaʊntɪfʊl
/A woman who engages in ostentatious acts of charity to impress others.Pip really will be missed, as she has been a Lady Bountiful on behalf of Orange for so many good arts causes.
Early 19th century: from the name of a character in Farquhar's The Beaux' Stratagem (1707)
See parent entry: lady