[ noun ] an acrobat able to twist into unusual positions <noun.person>
Contortionist \Con*tor"tion*ist\ (k[o^]n*t[^o]"sh[u^]n*[i^]st), 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. [1913 Webster +PJC]
Tijuana's charms included a block-long bar, a gambling joint where Al Capone lost half a million dollars and a floor show headlined by a half-dressed contortionist billed as the Pretzel Woman.
I would stress that buyers consider whether they will use the Laser to carry more than one other passenger with any regularity, because the Laser RS Turbo back seat was made for a contortionist.
Jimmy, a musician, occasionally accompanies the Hungarian lady contortionist, who can balance herself on one finger while shooting a bow and arrow with her legs.