Kill file

File used in Usenet groups to hide people or subjects

A kill file is a file used by some Usenet reading programs to discard articles matching some unwanted patterns of subject, author, or other header lines. Adding a person or subject to one's kill file means that person or topic will be ignored by one's newsreader in the future. By extension, the term may be used for a decision to ignore the person or subject in other media.

This keyword could refer to multiple things. Here are some suggestions: