Whist

n.

Heard in Armagh, Kilkenny, Donegal, Cavan, Sligo, Carlow, Leitrim and Kerry

An exclamation calling for silence or quiet attention.

In use

Whist now, hi, will ye listen to dat racket!

Posh English

Hush now, my good fellow, and listen to that tremendous racket!

Same phrase, other counties