There is a novel titled 'Ball Don't Lie', and a film also based on the novel with the same name (visit: [Wikipedia synopsis](http://en.wikipedia.org/wiki/Ball_Don%27t_Lie)). Then the sentence becomes more famous in sports world after Rasheed Wallace used it in one of NBA games (watch YouTube video [here](http://www.youtube.com/watch?v=kkhWeEGyIdI)).

So I'm just curious, isn't there clearly a grammar mistake in this term? Shouldn't it be "Balls Don't Lie", or "Ball Doesn't Lie"?