
- Are you sure?
- Don't be SILLY.
The Big Bang Theory Season 11, Episode 9

Okay, this is SILLY.
The Big Bang Theory Season 11, Episode 11

- Oh, Raj, you're our guest.
- Don't be SILLY.
The Big Bang Theory Season 7, Episode 10

Don't be SILLY.
I borrowed one of your pillowcases.
The Big Bang Theory Season 2, Episode 2

with SILLY accents?
The Big Bang Theory Season 7, Episode 18