Hier Kom Kak!
Haha ... I photographed this sign on the side of a 4 by 4 vehicle taking part in an extreme desert rally in southern Namibia.
The humor in it stems from an Afrikaans idiom which, roughly translated, means "the shit is about to hit the fan" and which, in turn, has been 'translated' into the San tongue - the 'X'es and exclamation marks (!) representing the 'click' sounds of that language.