Exactly what it says on the tin really. Who is the person in charge of household finances - i.e. how much is coming in, paying of bills, managing a budget (if you do this at all). Is it you, your partner or is it something that is done jointly?
In our house it's DH because I absolutely cannot stand thinking about money but we have our own bank accounts and sort of divvy up the bills. But largely, he is in charge of finances. I mentioned this to a friend and she was horrified - felt it was old fashioned and completely anti-feminist. My view is that I can't be arsed so am grateful he does it.
So who is the money manager in your house?