独身貴族 (どくしん きぞく, dokushin kizoku; 単身贵族 in Chinese) is a Japanese word that literally means “An unmarried (独身) noble (貴族)”. It figuratively describes a single working person (especially the rich) who enjoys freedom and splurges on his/herself without making a serious commitment to someone else. Obviously, this word was coined in comparison to married people who have to devote their time and money to their family and live a more restricted, frugal – yet more romantic and fulfilling, hopefully – life than what they used to live in their singlehood. Sometimes, this word is used as a sugar-coated expression for unmarried people who are single yet don’t really enjoy a luxurious lifestyle.
貴族 (きぞく): a noble
独身 (どくしん): be single
独身時代 (どくしん じだい): singlehood
He fully enjoys being an unmarried noble.
A single person: Actually, I am still single.
A married person: Ah so you’re an unmarried noble! I’m jealous of you because you can spend much money on your hobbies!