Arm wrestling involves two participants. One places one arm on a surface with their elbows bent and touching the surface, and they grip each other's hand. The goal is to pin the other's arm onto the surface, with the winner's arm over the loser's arm.
Contemporary art is art produced at the present period in time. Contemporary art includes, and develops from, Postmodern art, which is itself a successor to Modern art. In vernacular English, "modern" and "contemporary" are synonyms, resulting in some conflation of the terms "modern art" and "contemporary art" by non-specialists.