Up the Dubs
The Dublin GAA cheer, roared from Hill 16 and every pub in the county.
Sam's comin' home again, up de Dubs!

Shall I translate it into posh English for you, horse?
Good evening. The butler let you in? Here it is in posh English.
The Sam Maguire Cup returns to the capital once more. Hurrah for Dublin!
Questions
What does up the Dubs mean in Ireland?
The Dublin GAA cheer, roared from Hill 16 and every pub in the county.
How do you use up the Dubs in a sentence?
“Sam's comin' home again, up de Dubs!”
Updated
On the list: Irish slang phrases