Ok, this may not technically be celtic, but I liked the alliteration so ... deal with it.

Anyway:

In a couple of songs I have on my Black Family CD and Mary Black CD, there's reference to "moleskin trousers" (e.g. in "Schooldays Over," "time to be wearing the moleskin trousers, time to be going away..." and also in "The Leaboy's Lassie," there's a reference to moleskin trousers). Is this poetic shorthand for "working class" or laborer?

Also:

In Kate Rusby's "Bold Riley," she sings that "come White Stocking Day you'll be drinking rum..." What does that mean?

thanks, ww