bug-of-the-month club n. A mythical club which users of
{sendmail} belong to; this was coined on the Usenet newsgroup
comp.security.unix at a time when sendmail security holes, which
allowed outside {cracker}s access to the system, were uncovered
at an alarming rate, forcing sysadmins to update very often. Also,
more completely, `fatal security bug-of-the-month club'.