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

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 fish? We're discussing tax incentives for local businesses—not exactly a related topic!

Common Names:

Name	Pronounced	Usage
Wybert	-	Medieval English
Khazhak	-	Armenian
Berry (2)	BER-ee	English (Rare)
Agapetus	-	Ancient Greek (Latinized)
Aisling	ASH-ling	Irish
Adelaide	['ædəleid]