Cartouché literally means "cartridged" or "loaded with cartridges," often referring to a weapon. However, in French slang, especially in the context of rap, it's used to mean "broke" or "out of money."
In the lyrics, "100 balles dans des garo j'suis cartouché" (100 euros on cigarettes, I'm broke), Houdi uses this word to express that he's spent all his money, creating a vivid and somewhat ironic image of being "loaded" but with debt or expenses rather than wealth. It's an interesting example of how slang can repurpose words to create new meanings.
This track is Houdi's guest verse on episode 77 of GRHÜNT, a French freestyle rap series where different rappers take turns over one beat. The "77" comes up everywhere: it's the episode number, it's the floor of the skyscraper he raps from, and it becomes his own catchphrase.
Houdi paints himself as a self-made success story — "like a CEO" on the "seventy-seventh floor," praying for protection while boasting about money, women, and loyalty to his circle. He warns rivals not to test him, calls out people who fake it for attention, and name-drops a gun (a Smith & Wesson) as a threat rather than something he'd actually need to use.
Underneath the bravado, there's a running theme of proving himself: coming from nothing, staying loyal to family ("in front of my mom I keep my mouth shut"), and refusing to bow to police or critics ("in front of the cops I'm never good"). The repeated "seventy-seventh floor" hook ties the whole verse together as his signature line for the episode.