@Roberto ********
he is referring to the letters "BKK", which is the IATA code of Suvarnabhumi airport. Although clearly a reference to the city Suvarnabhumi airport is serving, this IATA code is still only referring to the actual airport. Not to the city. And neither to some bank. He hence implies finding the phrase "if you mean ..." redundant. To him, the reference to the airport is the only viable possibility.
And to me as well.