Very MATURE.
You're lucky I'm out of Silly String.
The Big Bang Theory Season 6, Episode 22
I mean, we spent the whole
night trying to be MATURE,
The Big Bang Theory Season 7, Episode 14
So you want to seem
MATURE and confident.
The Big Bang Theory Season 12, Episode 12
That would be
the MATURE thing to do.
The Big Bang Theory Season 11, Episode 15