
of virtual particles
in a VACUUM,
The Big Bang Theory Season 5, Episode 23

He's working on a paper
about nano VACUUM tubes,
The Big Bang Theory Season 7, Episode 7

...due to quantum VACUUM fluctuation?"
The Big Bang Theory Season 1, Episode 13

or VACUUM cleaner salesman,
or bootblack.
The Big Bang Theory Season 5, Episode 6

But I am ready to be helpful.
In fact, gonna go VACUUM.
The Big Bang Theory Season 10, Episode 10