casting couch
noun [ C usually singular ] humorous uk/ˈkɑː.stɪŋ ˌkaʊtʃ/ us/ˈkæs.tɪŋ ˌkaʊtʃ/
上床，肉体交易（指演员为获得某个角色而与有决定权的人发生性关系）
If you say that someone has got a good part in a film or play by using the casting couch, you mean that they had sex with the person who was choosing the actors in order to get the part.