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Related to rider: free rider
"Famine," the third of the Four Horsemen of the Apocalypse, so named for the black horse upon which it rides. The food shortages are at a critical level, as if the black rider has swept through the country and demolished our fields and supplies.
A stipulation in a contract (of an actor, director, etc.) intended to ensure that a film's cast and crew is representationally diverse. The term gained widespread attention when actor Frances McDormand used it in her Academy Awards acceptance speech in 2018. Several prominent actors that I represent have insisted upon inclusion riders in their recent contracts in order to guarantee that there will be more diversity on set.
See also: rider