
You're right, it's BRILLIANT.
Let's take it from the top.
The Big Bang Theory Season 5, Episode 14

There's a rich history of BRILLIANT minds
descending into madness.
The Big Bang Theory Season 9, Episode 10

because as BRILLIANT as he was
he only had two eyes,
Money Heist Season 1, Episode 12

I can't go to the office every
time I have a BRILLIANT thought.
The Big Bang Theory Season 11, Episode 14

Brilliant.
The Big Bang Theory Season 2, Episode 11