A cool word I stumbled upon recently that, unfortunately, no longer describes me. (Hell, it probably never did in the first place!)
The swinging bachelor
The aristocratic nobleman
Basically, a 独身貴族 is a dude who has enough money and time to live the good, SINGLE life, most probably to the bitter end. Good examples might be actor George Clooney or billionaire entrepreneur Richard Branson.
For further reference: