Cyar
Car, the way it's said in Derry and Armagh, with a wee y sound slipped in. Same for cyant and cyast.
Heard in Armagh
Get in the cyar, we're late for Mass.

Shall I translate it into posh English for you, mucker?
How marvellous! A visitor with curiosity. Here it is in posh English.
Do get into the car. We are late for Mass.
Questions
What does cyar mean in Ireland?
Car, the way it's said in Derry and Armagh, with a wee y sound slipped in. Same for cyant and cyast.
Where in Ireland do people say cyar?
People say cyar in Armagh.
How do you use cyar in a sentence?
“Get in the cyar, we're late for Mass.”
Updated
On the list: Irish slang words
Same phrase, other counties
- Armagh (not in the dictionary)