Is "supercalifragilisticexpialidocious" a real word referring to Irish hookers?

"Dear Straight Dope:

A friend and I were talking about how easy it is to bullshit ignorant people even though one may be very ignorant in that particular subject matter themselves. So we decided to bet a small sum of money whether we can bullshit each other. We each gave each other four obscure facts of knowledge and we have to find out the one that is bullshit. The one I believe is bullshit is that the Mary-Poppins-coined word 'supercalifragilisticexpialidocious' is really a term regarding Irish whores. Thus far my research into the subject has turned up an author named Eric P. Hamp, who has various Celtic stuff that mentioned the word in question. However, I can't find the exact text. Please help me win a bet. --Aaron Frale" (hit the link for the explanation.)