"As if I could give a hang!" Now what could be the derivation of that phrase?

Has it already been discussed? Are you gonna say, "LIU!" Are you gonna pull "YART" on me? As if I could give a hang!

No, really, rudeness aside from the very bored, very irritable Wordwind, I really would love to know where that terrifically useful phrase comes from because I really do give a hang about it, whatever a hang is. I better be careful here since I don't know what a hang is!

Bored regards,
WordWilting