(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
Lilith	LIL-ith (English)	Near Eastern Mythology, Judeo-Christian Legend
Stacey	['steisi]
Sa'adat	-	Arabic
Ivano	-	Italian
Sahak	-	Armenian
Cecil	['sesl]