gold digger

a person who seeks or digs for gold in a gold field.

Informal. a woman who associates with or marries a man chiefly for material gain.

Origin of gold digger

An Americanism dating back to 1820–30

In straight relationships with an age gap, words like ‘gold-digger’ and ‘trophy wife’ get thrown around.

Freaking Out About Age Gaps in Gay Relationships Is Homophobic |Samantha Allen |January 9, 2015 |DAILY BEAST
You go for your gold-digger lessons, then you go get waxed and tanned.

Russia’s Gold Digger Academy |Peter Pomerantsev |November 11, 2014 |DAILY BEAST
New York Post columnist Andrea Peyser called her a gold-digger who “flirted like a tart” with Cain.

A Flood of Harassment Horror Stories After the Herman Cain Allegations |Lauren Ashburn |November 11, 2011 |DAILY BEAST
She also had hopes of becoming a child psychiatrist and was concerned about appearing to be a “gold-digger.”

The Mysterious Mrs. Woods |Jacob Bernstein |November 30, 2009 |DAILY BEAST

Only one short glance he gives them; another to a pistol which hangs holstered on the hip of a gold-digger guarding him.

The Flag of Distress |Mayne Reid
The gold-digger throws aside his pick in despair at the very point where another stroke would have turned up the ore.

The Expositor's Bible: The Gospel of St. John, Vol. I |Marcus Dods
Lois will simply put up barrels of money, without missing them, and give a grand job to a little Broadway gold-digger.

Murder at Bridge |Anne Austin
Mr. Green was an English gold-digger, and was travelling along the main road to his home at Spitzcop.

The Last Boer War |H. Rider Haggard
A Californian gold-digger, having become rich, desired a friend to procure for him a library of books.

The American Joe Miller |Various

gold-digger

a person who prospects or digs for gold

informal a woman who uses her sexual attractions to accumulate gifts and wealth or advance her social position

gold-digging, noun