
Okay, all I'm giving you is the NAPKIN,
Sheldon.
The Big Bang Theory Season 2, Episode 11

Ooh, are-are you gonna
write it on a NAPKIN
The Big Bang Theory Season 12, Episode 17

Oh, damn it. Can I have a NAPKIN?
The Big Bang Theory Season 3, Episode 5

trying to make sense of it.
That NAPKIN.
Breaking Bad Season 4, Episode 7

Yeah, he's writing it on
a NAPKIN like in the movies.
The Big Bang Theory Season 12, Episode 17