
Yeah. It was FUN.
It kind of reminded me of my high school.
The Big Bang Theory Season 6, Episode 21

Half the size of O-gauge,
but twice the FUN."
The Big Bang Theory Season 5, Episode 3

but we did kinda have FUN
working on the prototype.
The Big Bang Theory Season 9, Episode 19

when Fun with Flags was born.
The Big Bang Theory Season 10, Episode 21

You made FUN of us.
Said it was stupid.
The Big Bang Theory Season 7, Episode 21