Cape Town Daily Photo

Say what?

I found this piece of graffiti in Salt River interesting - I think it was because of the dark layers of muted colours beneath, covered by the bold white lines. I stood looking at this piece of graffiti for quite some time before realising that either it never meant anything, or I was just not going to see what the artist was trying to say.

Do you have any idea what this could mean, or do you think the artist wasn't an artist, or expressionist, at all?