ignorelist

Internet slang, primarily associated with early online communities and newsgroups (Usenet), for a kill file -- a filter that automatically hides posts from specific users so you never see them. Adding someone to your ignorelist meant their messages would never appear in your feed. The term is largely obsolete as modern platforms have built-in mute and block features that replaced this earlier user-side solution.

An ignorelist — also known as a kill file — is an internet term for a personal block list used in forums, newsgroups, and chat systems to filter out posts or messages from specific users you've decided aren't worth your time. Predating modern block and mute buttons by decades, the ignorelist was the old-school way of maintaining your sanity in early online communities. Adding someone to your ignorelist meant their words simply vanished from your view — silent, invisible, gone.

(Internet slang, uncommon) A kill file.