So you want to seem
MATURE and confident.
The Big Bang Theory Season 12, Episode 12
I'll put that money into a CD,
wait for that CD to MATURE,
The Big Bang Theory Season 11, Episode 9
...now you're more MATURE.
The Big Bang Theory Season 8, Episode 20
and that stands for
"MATURE audiences," buster.
The Big Bang Theory Season 9, Episode 21