
- That's so SILLY.
- It's actually based on very sound theories.
The Big Bang Theory Season 1, Episode 16

Silly frog. So funny.
The Big Bang Theory Season 6, Episode 19

and I told her
she was being SILLY,
The Big Bang Theory Season 12, Episode 3

just to let something as SILLY
as lung cancer take me down?
Breaking Bad Season 5, Episode 12

Okay, Amy, you're being SILLY.
The Big Bang Theory Season 4, Episode 22