
and build his cognitive life
back up on FIRM principles.
The Big Bang Theory Season 12, Episode 10

HOWARD: I'll call you back
when we FIRM up the details.
The Big Bang Theory Season 2, Episode 8

So remember, the key is to be FIRM.
The Big Bang Theory Season 8, Episode 24

You know, b-but
they're very FIRM,
The Big Bang Theory Season 7, Episode 2

You stood FIRM before Berlin
who is crackers.
Money Heist Season 1, Episode 11