Guys, you're
being CHILDISH.
The Big Bang Theory Season 7, Episode 16
Do you know how CHILDISH you sound
right now?
The Big Bang Theory Season 3, Episode 7
It's a CHILDISH trick designed to confuse
and intrigue simpletons.
The Big Bang Theory Season 4, Episode 18
Don't make it sound CHILDISH.
The Big Bang Theory Season 12, Episode 14
That's a bit Childish, isn't it?
The Big Bang Theory Season 10, Episode 11