I thought it was an EXPRESSION
of passion,
The Big Bang Theory Season 5, Episode 14
What exactly does that EXPRESSION mean,
"friends with benefits"?
The Big Bang Theory Season 2, Episode 21
Ahh. Yes, she's pushy and, yes,
he's whipped, but that's not the EXPRESSION.
The Big Bang Theory Season 3, Episode 3
I could deduce by his facial EXPRESSION
and body language that he was sad.
The Big Bang Theory Season 10, Episode 16
...and did so
using a stern facial EXPRESSION.
The Big Bang Theory Season 4, Episode 24