When someone says something dumb to you and they might not even realize they're doing it, but you caught on. This is referencing when you call something a twitter post- it's actually called a tweet.
Taylor: How did the slaves build the tunnel for the Underground Railroad? When did they have the time?

responses could be:

Tatum: That's such a twitter post lol
or
Tatum: Omg twitter post
by Channing Taytum August 30, 2018
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