Someone who obtains goods or services legally without paying. / (economics) One who obtains benefit from a public good without paying for it directly.

(US, politics, historical) In the United States during 1961, a civil rights activist who participated in one or more trips by bus or other forms of transport, known as freedom rides, through parts of the southern U.S. to demonstrate opposition to racial prejudice and segregation.

(idiomatic) Death, the Grim Reaper or angel of death; and one of the Four Horsemen of the Apocalypse.

(idiomatic) Conquest or Pestilence, one of the Four Horsemen of the Apocalypse.

(idiomatic) Famine, one of the Four Horsemen of the Apocalypse.

(idiomatic) War, one of the Four Horsemen of the Apocalypse.

A children's playground item consisting of a large spring beneath a central beam or flange on which the rider sits and rocks.

(medicine) A bony deposit in the muscles of the upper and inner part of the thigh, due to the pressure and irritation caused by the saddle in riding.

Alternative form of postrider

(military) A messenger on a motorcycle. / A postrider or mounted courier (eg the US Pony Express)