McDonald's Pounded Over 'Bob' Menu Advert - Yahoo! News UK A bit of research would have revealed that this wasn't right. McD's appeal that English is constantly changing doesn't really wash. Constantly changing? Yes, but 39 years is a bit out! To be fair, 'bob' hasn't completely died out, but did refer to a shilling, now a five pence piece. Words do change their meaning, 'gay' is an obvious one, doesn't really mean frivolity anymore. Some words have different meanings in different parts of the world, US fanny = ass, UK fanny = lady parts. US fag = see gay, UK fag = cigarette. Is our Pound referred to by 'Bob' in any parts of the States?