What dose that have to do with the grass and the goose on the side of a mountain?

exp.

Heard in Carlow

The response to a completely irrelevant statement. Usually uttered by irritated elderly people who have been interrupted mid-rant.

In use

Timmy: "I found an apple on my way to school today" Grandad: "What dose that have to do with the grass and the goose on the side of a mountain?"

Posh English

Timmy: I discovered an apple en route to school. Grandfather: And what bearing has that upon the grass and the goose on the flank of a mountain?