Historical clue formulations

• Off one's game — 2023-08-23
• Off, palindromically — 2021-11-01
• Performing beneath one's usual level — 2017-02-19
• Off — 2011-09-12
• Idle — 2011-03-06
• Off — 2008-07-10
• Off — 2007-02-14
• Off — 2002-10-13
• Off — 2000-12-03
• "___ your life!" — 1997-08-20
• Idle — 1997-01-05
• "___your life!" — 1996-02-13
• Off — 1994-04-12