gold digging

基本解释

As more women become financially successful, fewer of them are interested in "gold digging", but male "gold diggers" are becoming more common.
随着越来越多的女性在经济上成功自立，有意于“傍大款”的女性就越来越少了，反而是男性当中“傍款”的人越发常见了。
blog.sina.com.cn
More shocking than the non-gold-digging women, however, were the men.
比不是到金龟婿的女士更令我吃惊的却是男人。
A second--and perhaps even more representative--remnant of this primal dynamic could be the "marriage of convenience, " or so-called "gold-digging."
动物的原始冲动流传下来的另外一个，更具代表性的产物就是“权宜婚姻”，也即所谓的“钓金龟婿”。

During those long summer days, The Luck was carried up the mountain to the place where the men were digging for gold.
Huge digging machines and crushers were needed to get the gold from the rock.
One of these companies continued to make a profit digging gold until nineteen sixty-six.

Still, the economic analysis of marriage explains one age-old phenomenon: gold digging.
FORBES: The Economics Of Prostitution