An out-of-control sliding motion as would result from applying the brakes too hard in a car.

A shoe or clog, as of iron, attached to a chain, and placed under the wheel of a wagon to prevent its turning when descending a steep hill.

(by extension) A hook attached to a chain, used for the same purpose.

A piece of timber or other material used as a support, runner of a sled, ski-shaped runner or supporting surface on aircraft, a basic platform for storage and transport, or one of a pair of horizontal rails or timbers for supporting objects.

(aviation) A banked sideslip where the aircraft's nose is yawed towards the low wing, often due to excessive rudder input.

(sports) A losing streak.

(Internet slang) A stepchild.

(Internet slang) A script kiddie.

(intransitive) To slide along the ground, without the rotary motion that wheels or tracks would normally have.

(intransitive) To slide in an uncontrolled manner as in a car with the brakes applied too hard, the wheels sliding with limited spinning.

(intransitive, transitive, aviation) To operate an aircraft in a banked sideslip with the nose yawed towards the low wing.

(transitive) To protect or support with a skid or skids.

(transitive) To cause to move on skids.

(transitive) To check or halt (wagon wheels, etc.) with a skid.

(Internet slang) To steal or copy, especially computer code.