Hi Iona - you're right about someone called Cwdyn being on Twitter! No profile details though and, mercifully, no picture. Thanks for correcting my spelling of it too, Welsh spelling not my forte (I spell as it sounds to me!).
I didn't know about the variation of "cod" (despite codpiece - which my old Armenian landlady used to call "codfish"). My original query came from when my parents had a shop and we would ask if the customer required a "cwdin"; I remember someone mentioning at the time that "cwdin" meant something else in y gogledd so I've been careful about using the word ever since!
I think I was still on message. I made some points about pronunciation and meaning to which no one has responded. If anyone objects to that, I'll withdraw from the discussion, dim problem. 
Nothing like lowering the tone!
Just thought of something but I don't know if it's true. Maybe someone from y gogledd can confirm it for me. The southern word for bag, "cwdin", I was once told is used in the north for scrotum.
Many, many years ago there was a quiz programme on Welsh TV during which the panel had to guess where someone was from (in Wales) by their accent/dialect. I don't know if anyone else remembers this or what it was called. It's not just north and south, dialect and accent differ between different areas. My paternal grandmother, who was born in Porthgain/Llanrian (Pembs) used to pronounce "haul" as "hoyl".
Great Emyr - that's another one to add to the list for Carmarthen dialect. It must be true that every area has its own dialect. That's not just true of Welsh either; I have an Italian friend from Liguria who has difficulty understanding Italians from other areas.
I'll print that out to show to my parents when I next go to Carmarthen. Wnco mwnco, danjerus and some others are very familiar. Does anyone else use the word "stecs" for "soaking wet"?
SWS also stands for Social, Welsh & Sexy!! (I can manage 1 out of 3)
I don't know anyone in Carmarthen who uses "hoffi"; everyone says "licio". "Becso" and "poeni": if I'm worried about something then "becso" but if someone is bothering/annoying me it's "poeni".
