Historical clue formulations

• Chickens (out) — 2017-12-01
• Wusses — 2011-12-19
• Ones likely to chicken out — 2006-12-18
• Wusses — 2004-11-23
• Chickens — 2003-03-06
• Pushovers — 2000-05-19
• Non-macho men — 1994-10-11