His IMAGINARY girlfriend
broke up with him.
The Big Bang Theory Season 1, Episode 2
...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
Was that the IMAGINARY
talking koala?
The Big Bang Theory Season 12, Episode 4
How is it IMAGINARY that
I keep hearing an octave above middle C?
The Big Bang Theory Season 2, Episode 10