Definition of idlers:
(n) :
One who idles; one who spends their time in inaction.
(n) :
One who idles; a lazy person; a sluggard.
(n) :
A mechanical device such as a pulley or wheel that does not transmit power through its own axle, but forms part of a gear train, supports a moving belt, etc.
(n) :
(nautical, dated) Any member of a ship's crew who is not required to keep the night-watch.