(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
Avksentiy	-	Russian
Toma (1)	-	Russian
TeÀRlag	-	Scottish
Tzivia	-	Hebrew
Martina	mahr-TEE-nah (Italian, Spanish, Dutch), mahr-TEEN-ə (English)	German, Italian, Spanish, Catalan, Czech, Slovak, Croatian, Slovene, English, Swedish, Dutch, Ancien
Maxine	[mæk'si:n]