It would appear The Muffin Man was a short legged sea bird who sold inferior cup-cakes outside a theatre. So says Frank anyhow...
http://www.youtube.com/watch?v=aFIMWRXWY90Some people... some people like cupcakes exclusively, while myself, I say
There is naught nor ought there be nothing so exalted on the face of gods grey
Earth as that prince of foods... the muffin!
Girl you thought he was a man
But he was a muffin
He hung around till you found
That he didn't know nuthin
Girl you thought he was a man
But he only was a-puffin
No cries is heard in the night
As a result of him stuffin