(transitive) To remove (someone) from a position marked by the wearing of a wig, such as that of barrister or judge.
1844, Charles Waterton, “The Wren, the Hedge-Sparrow, and the Robin” in Essays on Natural History, Chiefly Ornithology, Second Series, London: Longman, Brown, Green, & Longmans, p. 96,
[…] only the other day, in Dublin, a high dignitary of the law did exhibit such palpable partiality in a cause of “Victoria versus Repeal,” that he ought to have been unwigged there and then, and banished for ever from that arena of marked injustice to poor ould Ireland, and her patriot sons.