They make up a non-Newtonian FLUID
which is liquid...
The Big Bang Theory Season 2, Episode 3
in FLUID mechanics...
Can you imagine them preparing for a job?
Money Heist Season 3, Episode 2
I need to measure
my FLUID intake and output...
The Big Bang Theory Season 1, Episode 11
Just-- It's a FLUID situation.
Breaking Bad Season 5, Episode 12
Sheldon, this beaker used
to contain cerebral spinal FLUID
The Big Bang Theory Season 5, Episode 16