If I am not mistaken, I believe it is just a way of saying a "rich girl"

it generally means a woman from a nicer area. street numbers tend to run from low numbers (downtown) to high (uptown). obviously in that wouldn't work in 2008 New York City-but that's the notion.

1) uptown vs downtown "downtown (mostly US) either the lower, or the business center of a city or town" Source: http://en.wiktionary.org/wiki/downtown "uptown (mostly North America) the residential part of a city, away from the commercial center" http://en.wiktionary.org/wiki/uptown 2) ""Uptown Girl" is a song performed by musician Billy Joel, whose lyrics deal with a working-class "downtown man" attempting to woo a wealthy "uptown girl"." Source and further information: http://en.wikipedia.org/wiki/Uptown_Girl Billy Joel-Uptown Girl http://www.youtube.com/watch?v=2F-nt7aC_JQ (embedding disabled by request) Westlife up town girl (cover of Billy Joel song, featuring Claudia Schiffer, German Model) http://www.youtube.com/watch?v=ha3NimItLq4 3) "Uptown Girls is a 2003 comedy/drama directed by Boaz Yakin and adapted from the story by Allison Jacobs into screenplay by Julia Dahl, Mo Ogrodnik and Lisa Davidowitz. It stars Brittany Murphy (8 Mile) as a 22-year-old living a charmed life as the daughter of a famous rock and roll musician. Dakota Fanning (I Am Sam) co-stars. Tagline: They're about to teach each other how to act their age." "Synopsis Molly Gunn (Brittany Murphy) is a spoiled rock n' roll princess, living off the ample trust fund of her late rock legend father. Molly is carefree and fun-spirited but also can be irresponsible and immature, having no concept of money or the need to work for it. She keeps cash in the freezer of her Upper West Side apartment, treats her doorman like a personal servant and pays no attention to bills for phone, electricity or pet care." Source and further information: http://en.wikipedia.org/wiki/Uptown_Girls

The other answers are correct, and you can YouTube it to hear the 1983 Billy Joel song.

uptown (slang) (U.S.) condescending: pretentious or condescending in behavior or attitudes http://encarta.msn.com/encnet/features/dictionary/DictionaryResults.aspx?refid=1861708686 Cocaine, or less specifically, any high energy drugs. http://www.urbandictionary.com/define.php?term=uptown+ Powder cocaine http://www.whitehousedrugpolicy.gov/streetterms/ByAlpha.asp?strTerm=U A girl who occasionally takes drugs.

In general, I think it means someone out of your class.