Feeling So Fly Like a Cheesehead…

I found Feeling So Fly Like a Cheesehead while searching for mediatized examples of Wisconsin Englishes. In addition to the use of media, here YouTube, to create and reinforce the idea of dialect, there’s some interesting dialect stuff in the clip–listen for the devoiced /s/ in cheesehead and the stress on the second syllable of Wisconsin. And of course, there are slang examples: so as an intensifier, fly… I’m wondering how pervasive the use of fly to mean ‘cool’ is?