Rouiller literally means "to rust". It's a fantastic example of a word used metaphorically to create a powerful image.
In the song, OrelSan says, "Si j'suis parti, c'est parce que j'avais peur de rouiller" (If I left, it's because I was afraid of rusting). He's not talking about metal, but about himself—feeling stuck, stagnant, and slowly decaying in his rainy, unchanging hometown. It perfectly captures the feeling of needing to escape to avoid losing your shine.
La Pluie turns the never-ending drizzle of OrelSan’s Normandy into a colorful postcard of everyday France. Between jokes about dancing la chenille, gossiping grandmas, and freestyle sessions timed to windshield wipers, the rapper sketches a hometown where umbrellas are as common as unemployment benefits. He salutes a hard-working dad, a TV-swayed mom, and friends who range from book-smart to “haven’t-read-two-books,” all while Stromae’s smooth chorus peeks through the clouds like a shy sunbeam.
The rain is more than weather here – it is a metaphor for routine, doubt, and the risk of “rusting” if you stay still. OrelSan ultimately leaves in search of brighter skies, only to discover he misses the very showers he escaped. The song reminds us that gloom can breed creativity and that home is a mix of grey skies and hidden sunshine waiting to be noticed.