A Skid

1. An out-of-control sliding motion as would result from applying the brakes too hard in a car.
2. 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. Synonyms: drag, skidpan
3. (by extension) A hook attached to a chain, used for the same purpose.
4. A piece of timber or other material used as a support, or to receive pressure.
   1. A runner of a sled.
   2. A ski-shaped runner or supporting surface as found on a helicopter or other aircraft in place of wheels.
   3. A basic platform for the storage and transport of goods, machinery or equipment, later developed into the pallet.
   4. (nautical, in the plural) Large fenders hung over a vessel's side to protect it when handling cargo.
   5. One of a pair of horizontal rails or timbers for supporting anything, such as a boat or barrel.
5. (aviation) A banked sideslip where the aircraft's nose is yawed towards the low wing, often due to excessive rudder input.
6. (sports) (also losing skid) A losing streak.