They make up a non-Newtonian fluid
which is LIQUID...
The Big Bang Theory Season 2, Episode 3
It's like a waterfall
of LIQUID gold.
The Big Bang Theory Season 5, Episode 1
The world's most boring LIQUID
and the world's most boring vegetable,
The Big Bang Theory Season 10, Episode 13
Careful, Leonard. Liquid nitrogen,
320 degrees below zero.
The Big Bang Theory Season 1, Episode 5
Well, if we had a freezer, the condensed
LIQUID would cool more quickly
Breaking Bad Season 5, Episode 14