popular in the so-called "Triangle" area (that's Ballymoney, Coleraine, Portrush). used instead of "mate" e.g. "'bout ye sham" meaning "how are you mate?" Often claimed as an Ulster-Scots term. Ulster Scots is a "language" that has been spoken in Ireland for almost 10 whole years now.
Thats ok, it's fine,  'it's grand'
Making fun of someone, generally good-naturedly - e.g. "I'm only slagging you

wise up

Be Careful