That would be
the MATURE thing to do.
The Big Bang Theory Season 11, Episode 15
...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
I'll put that money into a CD,
wait for that CD to MATURE,
The Big Bang Theory Season 11, Episode 9
That's very MATURE of you.
The Big Bang Theory Season 9, Episode 13