
to the possibility
that the truth may sound SILLY
The Big Bang Theory Season 12, Episode 20

No, I'd look SILLY in that helmet.
The Big Bang Theory Season 8, Episode 7

There are a couple of things I did with
Penny that might be a little SILLY, but...
The Big Bang Theory Season 4, Episode 23

Ask a SILLY question.
The Big Bang Theory Season 7, Episode 2

Okay, well, thank you for that.
I got you and Leonard SILLY neighbor gifts...
The Big Bang Theory Season 2, Episode 11