
The brake might be IMAGINARY,
but that stop sign you just ran wasn't.
The Big Bang Theory Season 3, Episode 7

Is that IMAGINARY?
The Big Bang Theory Season 2, Episode 10

The line of scrimmage
is the IMAGINARY transverse line...
The Big Bang Theory Season 3, Episode 6

...while you sit there
hitting your IMAGINARY brake?
The Big Bang Theory Season 3, Episode 7

and then you would say,
"If you must invoke an IMAGINARY deity,
The Big Bang Theory Season 10, Episode 20