Barillet literally translates to "cylinder" or "drum" of a revolver. It's a specific and somewhat uncommon word in everyday French, making it stand out.
In the context of the song, the phrase "j'tourne le barillet" (I turn the cylinder) evokes imagery of preparing a firearm, suggesting a readiness for conflict or a dangerous situation. This makes the word intriguing and hints at the song's gritty themes.
Lagui opens by naming home before anything else: "Félix Pyat, rajoute A après Oliviers" (Félix Pyat, add an A after Oliviers). Those are the Félix Pyat and Oliviers A estates in Marseille's north, and the verses stay there. The mafia talk is delivered like accounting. Debts get chased by tracker, fines get settled by motorbike, and the punchline to the threats is a banking joke: "Si tu dois, on prend même virement SEPA" (if you owe us, we even take bank transfers). He means it as a boast about how organised the crew is, and it lands as dark comedy.
The hook then jumps to Olivia Valère, a luxury nightclub in Marbella on the Costa del Sol, which is where the money from the first half goes. Hash smoke, girls on the tables, and a reminder repeated four times: "Tu sais qu'l'addition s'ra salée" (you know the bill is gonna be steep). The second verse sours the party a little. "Elle veut l'plus friqué, elle veut pas l'plus fort" (she wants the richest, not the strongest) is his read on the women around him, and he spends as fast as he earns.