
It's Ferdinand T. Flag.
The Big Bang Theory Season 5, Episode 14

All right.
Is my pole FLAG related?
The Big Bang Theory Season 9, Episode 15

Did you know, that the FLAG
The Big Bang Theory Season 10, Episode 7

You know what?
That's not a FLAG question, next caller.
The Big Bang Theory Season 9, Episode 15

But like the FLAG over
Fort Sumter, I'm still here.
The Big Bang Theory Season 5, Episode 14