When I lived on the East Coast and flew US Airways (back than just USAir) a lot, we just called it Useless Air. Today I received an email from Useless Air  trying to get me buy back the miles I lost:

Our records indicated that 19,560 miles were forfeited on 12-01-2007 because your last activity date 05-19-2006 was more than 24 months ago.

May 2006 to December 2007 is more than 24 months on Useless Air’s calendar. Thank God I am not aging according to their schedule.