noun
man who marries a wealthy or upwardly mobile woman; male gold digger
Colloquial abbreviation of 逆玉の輿 (gyaku-tama no koshi), the male counterpart of 玉の輿 (tama no koshi, a woman marrying into wealth). Used for a man who marries a woman of higher economic or social status.
See also: 逆玉の輿
彼は逆玉で、社長令嬢と結婚した。
He's a male gold digger who married the company president's daughter.
逆玉狙いで合コンに行く男
Apparently some men go to group dates aiming to marry into wealth.