
Well, I was thinking about
Sheldon's little JOKE
The Big Bang Theory Season 5, Episode 20

It's a JOKE.
The Big Bang Theory Season 6, Episode 18

I already pretended to laugh
at that JOKE once.
The Big Bang Theory Season 11, Episode 8

Raj made the funniest JOKE, he said,
The Big Bang Theory Season 10, Episode 24

It was a JOKE.
The Big Bang Theory Season 3, Episode 2