backdoor man
01
隠れた愛人, 不倫相手の男性
a man who has an intimate relationship with a woman who is already in a committed relationship or marriage, often without the knowledge of the partner
非難的
慣用句
くだけた
例
He was known around town as a backdoor man.
町では彼は隠れた愛人として知られていた。
