Breeder may refer to: Breeder, a person who practices the vocation of mating carefully selected specimens of the same breed Breeder (animal), an individual animal used for selective breeding Breeder reactor, a type of fast neutron reactor that produces more fissile material than it consumes Breeder (slang), a pejorative term used against heterosexuals, especially those who have many children Breeder (cellular automaton), a pattern in a cellular automaton which grows quadratically Breeders may also refer to: The Breeders, an American rock band "Breeders", a song by Juliana Hatfield from the album Juliana's Pony: Total System Failure Breeders' Cup, an annual series of thoroughbred horse races Breeders (film), an American science-fiction horror film Breeders (TV series), an American-British comedy series created by and starring Martin Freeman See also Breed (disambiguation)