That's very MATURE of you.
The Big Bang Theory Season 9, Episode 13
I mean, we spent the whole
night trying to be MATURE,
The Big Bang Theory Season 7, Episode 14
Yes, and I think it's pretty
MATURE of me to admit it.
The Big Bang Theory Season 11, Episode 11
...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