Meaning

noun hairpiece covering the head and made of real or synthetic hair

noun British slang for a scolding

originClipping of periwig, itself an alteration of French perruque. The meaning of "to reprimand" perhaps came from this being something a bigwig would do or perhaps from the expressions to flip one's wig, wigs on the green, or dash my wig!

Etymology from Wiktionary, CC BY-SA 3.0