"Dw i'n mynd ma's."

Translation: I am going out.

[deactivated user]

Is "ma's" a southern thing?

I'm from the North and I've never heard that being used. It's always "Dw i'n mynd allan".

[azalea28]

Same! If this course is mostly southern I've got a feeling I'm gonna struggle!

[Lundgren8]

It’s been described as a mix of both.