Perne
/pəːn/rare. Now historical
verb
[with object] To turn (a garment); to change (one's opinion, adherence, etc.) frequently and insincerely.
Origin
Late 16th century. From the name of Andrew Perne (?1519–89), Master of Peterhouse, Cambridge, who became notorious for changing his position adroitly during the religious changes and reversals of successive Tudor regimes.