The Collaborative International Dictionary of English v.0.48:

Periwig \Per"i*wig\, v. t. [imp. & p. p. Perwigged
   (p[e^]r"[i^]*w[i^]gd); p. pr. & vb. n. Perwigging
   (p[e^]r"[i^]*w[i^]g*g[i^]ng).]
   To dress with a periwig, or with false hair. --Swift.
   [1913 Webster]