He's huge. It'd be FUN to
watch him float around.
The Big Bang Theory Season 12, Episode 15
...with FUN nicknames for each other.
The Big Bang Theory Season 6, Episode 6
I think it sounds FUN.
Yeah, me, too.
The Big Bang Theory Season 7, Episode 3
Well, Howard does make FUN
of him a lot.
The Big Bang Theory Season 11, Episode 10
You guys have FUN.
The Big Bang Theory Season 10, Episode 4