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