bug-of-the-month club

n. [from book-of-the-month club , a time-honored mail-order-marketing
technique in the U.S.] A mythical club which users of sendmail (8) (the Unix
mail daemon) belong to; this was coined on the Usenet newsgroup
comp.security.unix at a time when sendmail security holes, which allowed
outside crackers access to the system, were being uncovered at an alarming
rate, forcing sysadmins to update very often. Also, more completely, fatal
security bug-of-the-month club. See also kernel-of-the-week club.
