What's that got to do with the price of cheese

What's that got to do with the price of cheese?

A rhetorical question calling attention to a non-sequitur or irrelevant statement or suggestion made by another person. Primarily heard in UK. Yes, I agree that health care is an important issue, but what's that got to do with the price of cheese? We're discussing tax incentives for local businesses—not exactly a related topic!

Common Names:

Name	Pronounced	Usage
Valery	vah-LYE-ree	Russian
Narelle	-	English (Australian)
Theofylaktos	-	Greek
Sheena	SHEE-nə	Scottish, English
Charissa	kə-RIS-ə	English
Beatrycze	be-ah-TRI-che	Polish