From Buffy the Vampire Slayer, a cognate of "wigged out," "wiggy," and anything else like that you might think of. Something give you the wig, meaning that it scares you or freaks you out.
Alternative version: the wiggens.
Willow: I think dummies are cute, you don't?
Buffy: Nah, they give me the wig. Ever since I was little.
Willow: Really? What happened?
Buffy: I saw a dummy, it gave me the wig— there isn’t really a story there.