slush pile
noun [ C ] uk/ˈslʌʃ ˌpaɪl/ us/ˈslʌʃ ˌpaɪl/
（作者寄给出版社但很可能不会出版的）废稿堆
a pile of manuscripts (= early versions) of books that have been sent by writers to a publisher and that will probably n+ot be published
Her novel was rescued from the slush pile and made into a hit movie. 她的小说被从废稿堆里救了出来而且还改编成了一部热门电影。