In Belfast, if you enter a fast food takeaway and ask for a fish supper, the server may well ask "what's ur cawn" in a broad Belfast accent.  To which you might reply "fanta".  Over the years it has become commonplace to use this phrase as a greeting. So, instead of "what about ye?", you may say "what's ur cawn?".
local version of English slang term "git" also popular in North East of England

A way of a sales assistant asking if you are being served

A popular greeting of those of whom cant be bothered to say "Whats the craic?"
a way of greeting some1
how are you??
means hows it goin. . belfast
Saying hello to someone in Newry
How are you doing
Hello

Term used to describe a male.

 

"Bout ye big lawd" - "How are you sir?"

hello

 e.g. "ha boy, whats the craic?"

Hello
go away

A mess

 

e.g. "aw god you went arseways about that" 

how you say hello in irish

this is not technically slang.

you response by saying Dia's Muire dhuit.

irish for goodbye
Hello
Everything is going well. Reply to "What's the craic".
How are you
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