Ma'anar ƙamus na "contortionist" shine mutumin da ya ƙware wajen yin juzu'i, waɗanda suke matsananciyar matsayi ko motsi na jiki. Ƙwararru yawanci suna da sassauci da ƙarfi na musamman, kuma suna iya lanƙwasa, murɗawa, da jujjuya jikinsu ta hanyoyin da ba su yiwuwa ga yawancin mutane. Masu wasan kwaikwayo sau da yawa ƴan wasan kwaikwayo ne waɗanda ke nishadantar da masu sauraro tare da salon sassauci da bajintar jiki, kuma suna iya fitowa a cikin wasan kwaikwayo, wasanni iri-iri, da sauran nau'ikan abubuwan nishadantarwa.