Taking someone down to Chinatown is an old saying I think, though it's been in a lot of films. I've done a quick Google search and most people seem to know it from Meet the Parents, but there are examples of the saying from before then, most notably in [url=http://www.dailymotion.com/video/x7i9t2_cab-calloway-minnie-the-moocher-blu_music]Cab Galloway's "Minnie the Moocher"[/url], of "hi-dee hi-dee hi-dee hi, ho-dee ho-dee ho-dee ho" fame!