Literal translation
in Aubagne, when it rains, you get soaked
Meaning
a traditional jibe aimed at the people of Aubagne
Explanation
A traditional little jab aimed at the people of Aubagne, in the style of sayings that pin an imaginary quirk on every village. This one simply states the obvious: when it rains in Aubagne, people get wet just like anywhere else, and that is exactly the joke.