Contortionist n. One who makes or practices contortions; especially, A gymnast who is able to twist the limbs into positions impossible for normal people to achieve.
... usual, was rather perfunctory, if one excepts a pas de deux which gave promise of a parody of the Russians and turned out to be just a series of contortionist feats, brilliant but unlovely. ... — Punch, or the London Charivari, Vol. 156, Jan. 1, 1919 • Various