Craictose intolerant
Unable to digest fun of any kind.
He went home at half nine, he's craictose intolerant, de poor divil.

Shall I translate it into posh English for you, boi?
Lovely weather for a translation. Here it is in posh English.
He retired at half past nine. The unfortunate fellow is constitutionally incapable of enjoyment.
Questions
What does craictose intolerant mean in Ireland?
Unable to digest fun of any kind.
How do you use craictose intolerant in a sentence?
“He went home at half nine, he's craictose intolerant, de poor divil.”
Updated
On the list: Irish slang words