Not sure what it's called but the one that says
"My girlfriends name is Nancy but George is my best friend"
Geoff sings it occasionally but was never better received than the time he sang it in Whitby and remembered about half way through that a six foot goth transvestite had just come in the pub and was in fact sitting almost directly behind him!! He/she had in fact gone to the toilet (not sure which one)but the picture of horror on everyones face as they wondered who would finish first was a real sight!! Geoff chose to finish the song given that it is really not offensive and I am still not sure how much was heard by the goth as I was too busy laughing!