That's a bit Childish, isn't it?
The Big Bang Theory Season 10, Episode 11
Don't make it sound CHILDISH.
The Big Bang Theory Season 12, Episode 14
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
Guys, you're
being CHILDISH.
The Big Bang Theory Season 7, Episode 16