The Pale
Dublin and the counties around it, named after the old English Pale. What the rest of the country calls Dublin and the commuter belt.
Half de traffic on de road is people from de Pale headin' west for de weekend.

Shall I translate it into posh English for you, segocia?
Ah, a fellow connoisseur of language. Here it is in posh English.
Half the traffic upon the road consists of persons from Dublin and its environs, motoring west for the weekend.
Questions
What does the Pale mean in Ireland?
Dublin and the counties around it, named after the old English Pale. What the rest of the country calls Dublin and the commuter belt.
How do you use the Pale in a sentence?
“Half de traffic on de road is people from de Pale headin' west for de weekend.”
Updated
On the list: Irish slang words