I think I know what you mean... I think it's one of the versions of Johnny's gone for a soldier - the one that has something like 'left his two fine legs behind' in it. Chorus is something like 'ricky do dum dah, fol da diddle da, right fol diddle to me to rum dah'

I can't find it in the digitrad, though and can't remember the lyrics off the top of my head - and I could be wrong...