every periodic table,
every TEXTBOOK--
The Big Bang Theory Season 7, Episode 6
And I know
because I have the TEXTBOOK.
The Big Bang Theory Season 12, Episode 14
Oh, that is
TEXTBOOK encroachment.
The Big Bang Theory Season 12, Episode 14
He is a TEXTBOOK satisficer.
The Big Bang Theory Season 12, Episode 20
It would help if you stopped telling me
I have a TEXTBOOK cervix.
The Big Bang Theory Season 10, Episode 4