This is actually tricky. As the_Bird said, Richardson isn't good enough to justify a chant. However his punk behavior and actress comments can't go unpunished. Random heckling and booing when he touches the ball may do it.
But if we're going with a Chant, I agree with Vinnie. A mocking Quen-tin chant is the way to go.
The Brandy breakup is too old news to use.
A good ol' QUEN-TIN SUCKS works too. :-)