irishslang.info

Usually said before or after another word, boss means sir.

e.g. "Hi Boss!" or "What's the craic boss?"

irishslang.info
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?".
irishslang.info

Thanks, Don't stress yourself

irishslang.info
Hello

how you say hello in irish

this is not technically slang.

you response by saying Dia's Muire dhuit.

irishslang.info
a way of greeting some1
irishslang.info
A term that is used to greet a male
irishslang.info
How are you doing
irishslang.info
Hello