Definition of casting couch noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. The meaning of CASTING COUCH is a couch in an entertainment executive's office on which aspiring actresses are reputed to perform sexual acts in exchange for desired roles; broadly : the practice of abusing one's power to obtain sexual partners. casting couch in American English noun facetious a couch in the office of a casting director, supposedly used with actors or actresses willing to trade sexual favors for roles Casting couch A physical couch on the set of the pornography website Backroom Casting Couch The casting couch is a euphemism for the practice of soliciting sexual favors from a job applicant in exchange for employment in the entertainment industry, primarily acting roles. [1][2] The practice is illegal in the United States.