Historical clue formulations

• [It's time for bed!] — 2025-10-12
• Reflex that really is contagious — 2024-08-04
• [What a snoozefest!] — 2024-02-28
• [Bor-r-ring!] — 2023-10-16
• Sign for a speaker to wrap things up — 2023-09-24
• [What a snoozefest!] — 2022-06-19
• ["You're still talking?"] — 2022-01-02
• Action that may be "contagious" — 2021-01-26
• [That is so boring!] — 2020-10-13
• [So boring!] — 2019-10-03
• [Been there, done that] — 2019-04-11
• Jaw-dropping opening? — 2017-12-18
• Have a big mouth? — 2015-01-25
• Demonstration of disinterest — 2014-07-25
• Low interest indicator — 2013-06-14
• Act that's "contagious" — 2011-01-18
• Sign of fatigue — 2008-12-30
• Occurrence at many a lecture — 2005-04-07
• Open wide — 2005-01-26
• Sign of boredom — 2004-05-31
• [Been there, done that] — 2004-03-22
• [That is, like, so last week] — 2004-01-10
• [bor-r-ring!] — 2003-10-22
• Sign of boredom — 2002-12-30
• [Ho-hum] — 2001-10-17
• Indicate boredom — 2000-05-08
• Respond to a bore — 1999-11-23
• [bo-o-o-ring!] — 1999-10-03
• Open wide — 1997-12-15
• Exhibit boredom — 1995-03-13