as in old news. when someone has just told you information that you already know.
Beni went all out telling me about the 13 year old father in the UK, but I knew about it already. This news is so yestersay!
by annie004 February 20, 2009
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A statement or piece of news that everyone knows, or is out-dated. To describe such a statement as "yestersay" is like discarding it as "so yesterday".
Lisa: "Hey, did you hear that Jane Doe is dropping out of the Republican race?"

John: "Dude, that's yestersay!"
by nurdsmith January 5, 2012
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Words spoken the day before, or prior.
"Just do it" is yestersay.
by PrairieDawg October 24, 2008
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Yestersay- people’s inability to forgive someone’s past misdeeds, despite the incredible amount of actual good the person has done after

-Z
“Relationships where one or more parties have previous trauma are plagued with yestersay
by Zachariah720 September 15, 2020
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