Well if we want a definitive version, I'll add some more debauchery.

There's a girl by name of Dinah in Mobile
There's a girl by name of Dinah in Mobile
There's a girl by name of Dinah and they say there's nothing finer
Than the touch of her vagina in Mobile

There's a girl by name of Florrie in Mobile
There's a girl by name of Florie in Mobile
There's a girl by name of Florie with a cunt just like a quarry
You could drive up in a lorry in Mobile

There's a man by name of West in Mobile
There's a man by name of West in Mobile
There's a man by name of West and he thinks he's got a breast
But his balls are on his chest in Mobile.

The gulls fly round lighthouse in Mobile
The gulls fly round lighthouse in Mobile
The gulls fly round lighthouse and they use it as shitehouse
So the lighthouse is a whitehouse in Mobile

But if you really want a yuk verse:

There's a shortage of san(itary) towels in Mobile
There's a shortage of san towels in Mobile
There's a shortage of san so they wait until it fouls
Then they scoop it out with trowels in Mobile.

Most of which I learnt at the wonderful sessions they used to have at "The Prospect of Whitby", Wapping, London.