
I merely offer you a facial EXPRESSION
that suggests you've gone insane.
The Big Bang Theory Season 3, Episode 12

It led to an interesting EXPRESSION
in our house:
The Big Bang Theory Season 2, Episode 9

I thought it was an EXPRESSION
of passion,
The Big Bang Theory Season 5, Episode 14

Funny EXPRESSION, sleep tight. Ha-ha. Ha.
The Big Bang Theory Season 1, Episode 7

but I think I'm just an EXPRESSION of...
The Big Bang Theory Season 9, Episode 11