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
Piloqutinnguaq	-	Native American, Greenlandic
Tommy	TAHM-ee	English
TÓNi	-	Hungarian
Ali	['a:li]
Delilah	di-LIE-lə (English)	Biblical, Biblical Hebrew, English
Cymone	see-MON	English (Rare)