- Why do you have a history TEXTBOOK?
- No, it's... It's not a big deal.
The Big Bang Theory Season 6, Episode 6
And I know
because I have the TEXTBOOK.
The Big Bang Theory Season 12, Episode 14
It would help if you stopped telling me
I have a TEXTBOOK cervix.
The Big Bang Theory Season 10, Episode 4
every periodic table,
every TEXTBOOK--
The Big Bang Theory Season 7, Episode 6
He is a TEXTBOOK satisficer.
The Big Bang Theory Season 12, Episode 20