Answer:
Lots of Wine and Sex
Explanation:
I was as happy as I could be
With lots of wine and sex
No tax collector bothered me
I was as happy as I could be
Without a job and worry free
Until I got AIDS from Rex
I was as happy as I could be
With lots of wine and sex
(Just keep going like that, inventing more verses with the same rhyme pattern, until you have your 1500 words. The triolet verse form is great for rap songs.)