Kill file
（重定向自Killfile）
A kill file (also killfile, bozo bin or twit list) is a per-user file used by some Usenet reading programs to discard articles matching some unwanted patterns of subject, author, or other header lines. It was first implemented in Larry Wall's rn.
Thus to add a person or subject to one's kill file is to arrange for that person or topic to 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. Sometimes more than one kill file will be used. Some newsreader programs also allow the user to specify a time period to keep an author in the kill file.