Casual insults hurled at those children who were pigeon toed. Those whose feet were only mildly inward pointing were dubbed 'Ricky', short for 'rickets'(the condition caused by not eating enough yam flavoured sailors); the more severely afflicted were called 'Nobby', after the rhyming slang for haemorroids (Nobby Stiles: piles). Evidently, the child's imagined bumgrapes were so massive, that the only relief to be had was to walk around with his buttocks as far apart as possible, resulting in that unmistakable 'Elvis Costello' stagger.