Definition from Wiktionary, the free dictionary
Shortening of aristocrat
aristo (plural aristos)
- (informal) An aristocrat
2008 February 24, James Kaplan, “Reader, He Married Her”, New York Times:
- This is a beautiful world of enlightened aristos, the kind of people who know not only wine but Italian art and, to a great extent, themselves.
- (slang) A wealthy man, especially married, who has sexual affairs with much younger women and spends money on them