
That's very MATURE of you.
The Big Bang Theory Season 9, Episode 13

That would be
the MATURE thing to do.
The Big Bang Theory Season 11, Episode 15

So you want to seem
MATURE and confident.
The Big Bang Theory Season 12, Episode 12

...now you're more MATURE.
The Big Bang Theory Season 8, Episode 20

Yes, and I think it's pretty
MATURE of me to admit it.
The Big Bang Theory Season 11, Episode 11