
So now let's bring out THEORETICAL physicist,
Dr. Sheldon Cooper!
The Big Bang Theory Season 6, Episode 18

Theoretical physicists do not get canned.
The Big Bang Theory Season 1, Episode 4

Is it maybe because, like Sheldon's work,
your sex life is also THEORETICAL?
The Big Bang Theory Season 6, Episode 9

It happens to THEORETICAL
physicists all the time.
The Big Bang Theory Season 5, Episode 17

Of course not.
I'm a THEORETICAL physicist.
The Big Bang Theory Season 2, Episode 23