When I was in Tokyo in 2007, there were several billboards near my hostel with a well dressed man on them, and the caption was something like (bludgeoning it here) "トキょ　ダンヂイ？" which transliterates to "Tokyo Dandy?" My impression is that it's a word that entered the language from pre-war British English, and is probably used more in Japanese now than in English.

Maybe something like 「金持ちのダンディなおじちゃん」