The next image is a copy/pasted text from reddit (the original text is here) and it was put here, I've got it throught The Fan and Fulgerica. It's a great checkmate, one of the greatest I've seen lately.
It says that:
What does one black man call one white man?Your honor.
What do ten black men call one white man? Coach.
What do a hundred black men call one white man? Warden.
The reply is perfect: What do 100 million white men call 1 black person? Mr. President.