Hi Snuffy UK,
I like the Cancer and heart failute line and so will suggest a refrain of:
I started smoking to look cool
Puff away, drag away
Now I'm just a wheezing fool
Cancer and Heart Failure
Hmmm... "Smokin's gonna nail ya" is good too. (Maybe and improvement.) Have to get that "Cancer and heart failure" into a verse somewhere. Maybe two separate verses. (I have to stop thinking out loud. I'll stop now.)
More verses? The first few were easy. You could almost make this a zipper song and let folks jump in.