Proper noun
(US, politics) Honorific used in addressing the president of the United States; POTUS.
Alternative form of Mister President
Source: en.wiktionary.orgI don't know why his lawyers didn't tell him, 'You don't have to answer any questions about your private life, Mr. President. Let them sue you. Take the heat. You don't have to answer.' Chris Matthews
[mobster impression] Hey! Nice nominee you got there. [sniff, tightens tie] Be a shame if something happened to him, Mr. President. Know what I mean? Jon Stewart
I love Obama because he is proof all black people don't look alike. Nobody every told me, 'Good morning, Mr. President.' We don't all look alike. Paul Mooney
Everybody calls me Mr. President. It's true. It's a funny thing. Donald Trump
President George W. Bush, Mrs. Bush, ladies and gentlemen, dear friends. I'm glad to visit the United States in the lovely season of spring, at your invitation, Mr. President. I wish to convey to the great American people the warm greetings and best wishes of the 1.3 billion Chinese people. Hu Jintao
George W. Bush: How's your boy? Webb: I'd like to get them out of Iraq, Mr. President Bush: That's not what I asked you. How's your boy? Webb: That's between me and my boy, Mr. President. Jim Webb