I thought it was an EXPRESSION
of passion,
The Big Bang Theory Season 5, Episode 14
but I think I'm just an EXPRESSION of...
The Big Bang Theory Season 9, Episode 11
Ahh. Yes, she's pushy and, yes,
he's whipped, but that's not the EXPRESSION.
The Big Bang Theory Season 3, Episode 3
...and did so
using a stern facial EXPRESSION.
The Big Bang Theory Season 4, Episode 24
Funny EXPRESSION, sleep tight. Ha-ha. Ha.
The Big Bang Theory Season 1, Episode 7