That was FUN, ha, ha.
The Big Bang Theory Season 3, Episode 4
It has Shamu
who is literally tons of FUN.
The Big Bang Theory Season 4, Episode 19
...but why don't you stay and play?
It'll be FUN.
The Big Bang Theory Season 6, Episode 23
where we will take a look back
at the history of Fun with Flags
The Big Bang Theory Season 10, Episode 21
Nothing says FUN like being scolded.
The Big Bang Theory Season 10, Episode 15