Hi, you posted this a long time agon but just in case you never got a response then here goes.....

As a Dungarvan man myself I used to ponder this question. Waterford, the County that Dungarvan is the second biggest town in, used to be known as "The Deise" (Pronounced Day-Sha). Over time this evolved, through phonetic distortion, into "The Decies" as in "Dee-Cees". Thus what is written in the lyrics is a further truncation to "DCs" - nothing too elaborate and sexy I'm afraid.

I'm not sure what you interest in the song is but there is an imposter song out called "The Old Dungarvan Oak". A nice song but very twee and having nothing at all to do with Dungarvan originally. It is in fact a Welsh ditty called "The Old Caernaveron Oak" which was cleverly reworked (by changing one word!!!!).

As an aside Dungarvan originates from two Irish words "Dun" and "Garbhan" (in Irish the "bh" is pronounced as a "v"). "Dun" being the Irish for Castle and "Garbhan" being a Saint from the area (literally translated as a "rough man"). Thus Dungarvan = castle of the rough man!

As an Irish emigrant I am typically more prone than someone living in Ireland to maintaining links with Ireland - thus my son has been given the name Garbhan as a nod to home.

Regards,

Ciaran