The term 'Cork Sound' refers to two distinct sounds associated with the Irish city of Cork. The first sound is 'POP, ' which is a three-letter word that describes the sound of a champagne cork being popped open. The second sound is 'BROGUE, ' which is a six-letter word that describes the distinctive accent of the people of Cork. Both of these sounds are closely associated with the culture and history of Cork, and are often used to evoke a sense of nostalgia for the city.