a person who slips or slides because of loss of traction
<noun.person>
a worker who uses a skid to move logs
<noun.person>
a tractor used to haul logs over rough terrain
<noun.artifact>
Skidder \Skid"der\, n. One that skids; one that uses a skid; specif.: (Logging) (a) One that skids logs. (b) An engine for hauling the cable used in skidding logs. (c) The foreman of a construction gang making a skid road. [Webster 1913 Suppl.]
Candler County Sheriff Homer Bell said Crawford was operating a skidder, a type of heavy tractor used to haul logs, at a site near Stilson last week when the limb penetrated the protective cage on the tractor and pierced Crawford's body.