Vibrionnant is a fascinating and somewhat rare word derived from "vibrion," which refers to a type of bacterium that moves with a vibrating motion. It literally means "vibrating" or "swarming."
In the context of "Fin De Siècle," Noir Désir uses it to describe the universe "vibrionnant de mille éclairs" (vibrating/swarming with a thousand flashes). This evokes a powerful image of a chaotic, rapidly changing, and intensely active world, reflecting the song's themes of societal upheaval and technological acceleration at the turn of the century. It's a vivid and unique choice that paints a strong picture.
Noir Désir wrote "Fin de Siècle" as the 90s were running out, and the title says exactly what the song is about: an era closing with nothing settled. It opens on a shrug, "C'est comme la fin du siècle" ("It's like the end of the century"), then spends its verses listing off what that century leaves behind, sheriffs on the take, television as "le grand déversoir des images cyniques à boire à plein tube" ("the great spillway of cynical images to drink full blast"), a computer running the same instructions over and over. Nobody in the song fixes anything. They just wait for the next revolution to be announced and watch it arrive as spectacle.
Against all that cynicism, the chorus asks for one plain thing: "Nous on veut de la vie" ("We want life"), stretched out over a long, repeated "longtemps" until the word itself starts to feel like the point. It is a French rock band from the 90s at its most restless, guitars that build and never quite land, a singer sounding less like he's describing the end of the century than arguing with it.