What did Allen Iverson mean when he said: "We talking about practice"?

Allen Iverson, the star player for the Philadelphia 76ers basketball team, made this quote in a media session at the end of a disappointing season. Members of the media asked Iverson some questions about his work ethic and his dedication to practice, and he responded with rant that includes this quote, which has become a meme used to accuse someone of not being as dedicated to their craft as they could be.