wig 
(wĭg)
(wĭg)n.
An artificial covering of natural or synthetic hair worn on the head for personal adornment, as part of a costume, or to conceal baldness.
tr.v. wigged, wig·ging, wigs
Phrasal Verb: To scold or censure.
wig out Slang
To make or become wildly excited, enthusiastic, or crazy.
[Short for PERIWIG.]