Whist

n.

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

An instruction to remain silent or hold your tongue.

In use

Hold your whist now while the GAA results are on the telly!

Posh English

I say, do hold your tongue at once whilst the sporting scores are broadcast upon the television.

Same phrase, other counties