Historical clue formulations

• "Yuck" — 2019-01-20
• "Gross!" — 2014-07-13
• "Yuck!" — 2013-12-01
• "Gross!" — 2013-11-28
• "That's nasty!" — 2013-09-17
• "That's yucky!" — 2012-07-15
• "Ick!" — 2011-09-04
• "That's gross!" — 2006-01-01