It's a comic book JOKE.
The Big Bang Theory Season 7, Episode 13
I am soldier all my life.
You think I never hear JOKE?
Game of Thrones Season 6, Episode 8
I don't think it's serious at all.
I think it's another bad JOKE.
Game of Thrones Season 7, Episode 7
I never JOKE about math or sex.
The Big Bang Theory Season 2, Episode 20
The ogre is amused by your JOKE
and allows you to pass.
The Big Bang Theory Season 5, Episode 4