It was always a COIN flip.
The Big Bang Theory Season 5, Episode 24
I'm Master of Coin.
Saving money is important.
Game of Thrones Season 3, Episode 5
If only the Master of Coin had such power.
Game of Thrones Season 3, Episode 3
Then where's the COIN?
The Big Bang Theory Season 7, Episode 3
What kind of COIN is that?
Game of Thrones Season 3, Episode 10