(I'll be) hanged if I know!

I have absolutely no idea! A: "How are you supposed to turn on this newfangled computer?" B: "Hanged if I know!" I'll be hanged if I know how to fill out these tax forms!

Common Names:

Name	Pronounced	Usage
Talulla	-	Irish
Childers	['tʃildəz]
Grete	GRE-tə (German)	German, Danish, Norwegian
Torger	-	Norwegian
Brandon	['brændən]
Leontyne	-	English (Rare)