That is the friendly greeting that means both "hello" and "goodbye" in the native Hawaiian language.
VOA: special.2009.08.02
People in Argentina commonly kiss one another on the cheek in saying hello and goodbye, expressing a warm feeling even between a dentist office receptionist and patient.
This despite the fact that he only spoke a few words of English - "toilet, football, hello and goodbye, " he said - when he moved to the UK a year ago.