Bombay duck, or bombil as it is called locally, is one of Mumbai's polarising culinary experiences. This charmingly misnamed delicacy is actually a fish, whose pungent odour is part of that special love-it-or-hate it-Mumbai smell. It got its name in the days of the Raj, from being transported on an iconic train, the Bombay Daak, daak being the Hindi word for mail. The term was then bastardised to duck, which stuck.