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The humorous use of an existing song, play, or writing which changes the words to give farcical and ironic meaning. parodies have been challenged as copyright infringements on the original works, particularly since some have reaped terrific profits. recent decisions favor the parodies and say they have an originality of their own and, thus, are not infringements. there is a free speech issue involved in these decisions since parodies traditionally have so- cial and political significance.