homework folder
nounUS /ˈhoʊmwəɹk ˌfoʊldəɹ/
Etymology From homework + folder (“a virtual container in a computer's file system, in which files and other subfolders may be stored”), from the notion that a folder containing pornography would be hidden by disguising it under a generic false name. Unrelated to homework (“(slang, euphemism) sexual intercourse”).
Internet, Euphemistic, Humorous A personal digital collection of pornography, erotica and suggestive material, often images, hosted on a private folder, album, gallery, etc.
Internet, Broadly A hidden folder (directory).
Used other than figuratively or idiomatically: see homework, folder (a folder containing homework).