
He's eating, that's a good SIGN.
The Big Bang Theory Season 9, Episode 15

Wait, when you SIGN
"servants,"
The Big Bang Theory Season 5, Episode 4

any SIGN that anything
happened here.
Breaking Bad Season 5, Episode 12

I'd use Feynman's trick,
differentiate under the integral SIGN.
The Big Bang Theory Season 8, Episode 2

That's a great idea. I'm gonna get him
to SIGN a Batman as well.
The Big Bang Theory Season 3, Episode 16