gold digger
US /ˈɡoʊld ˌdɪɡ.ər/
UK /ˈɡoʊld ˌdɪɡ.ər/

1.
a person, typically a woman, who forms relationships with people purely to extract money or gifts from them
:
•
He accused her of being a gold digger after she asked for an expensive gift.
•
She's not interested in love; she's just a gold digger.