the.com/curler

means A person who plays curling, the sport where players slide heavy granite stones across ice toward a target while teammates sweep furiously to steer them.

from Straightforwardly agentive: 'curl' plus '-er.' The verb 'curl' meant to move in a curving or bending path, attested in Scotland by the 1500s, which is also where the sport itself took shape — the curved, swerving path the stone takes as it travels down the ice is the whole point of the name. 'Curler' simply followed once the game had a name worth playing.