Stop the lights

exp.

Heard in Kerry, Cork, Dublin and Sligo

An expression of astonishment or disbelief, equivalent to "hang on" or "wait, what did you say?".

In use

Did u hear about the match last nyt? oh stop the lights, how could dey hav won

Posh English

Did you hear about the athletic fixture last night? Good heavens, how on earth could they possibly have triumphed?

Same phrase, other counties