Thanks to Richard (at work) for pointing out this site of oral poet Benjamin Zephaniah. I like this one.
Wot a Pair
(not published in book form)
"I waz walking down Wye front street
When me trousers ran away,
I waz feeling incomplete
But still me trousers would not stay,
When I found where they had gone
De pair addressed me rather blunt,
And they told me they were sick of being put on
Back to front.
I told dem I would treat dem good
And wear dem back to back,
I promised dem protection
From a friend who is a mac,
Me trousers did not believe a single word I had to say,
And me underpants were laughing
When me trousers ran away."