It's like a waterfall
of LIQUID gold.
The Big Bang Theory Season 5, Episode 1
The correct answer is, "When covered by
LIQUID sufficient to reduce the coefficient...
The Big Bang Theory Season 2, Episode 5
The world's most boring LIQUID
and the world's most boring vegetable,
The Big Bang Theory Season 10, Episode 13
I'm not seeing anyone
using LIQUID helium vortices like this.
The Big Bang Theory Season 9, Episode 16
my original theory that space time
was like a super-cooled LIQUID,
The Big Bang Theory Season 9, Episode 18