This is part of a whole list of poems entitled "Rotten Rhymes" however some of the rhymes i admit are extremely vulgar/dirty, so here's the one (yea in the end there was only one) which i think is mildly acceptable:
Mary had a little lamb
Its fleece as white as snow
Everywhere that Mary went
The sheep was sure to go.
One day she went to the butcher shop
Expecting the lamb to come
The lamb looked her in the eye and said
"Yo bitch I ain't dumb!"
warren 06