You could have FUN with that.
The Big Bang Theory Season 5, Episode 10
Yeah. It was FUN.
It kind of reminded me of my high school.
The Big Bang Theory Season 6, Episode 21
...but why don't you stay and play?
It'll be FUN.
The Big Bang Theory Season 6, Episode 23
You actually think Penny will have FUN
at Comic-Con?
The Big Bang Theory Season 10, Episode 17
That's FUN.
Money Heist Season 3, Episode 6