A 30-year-old French rapper born in Paris to Senegalese parents. He's famous for his very deep voice and because you never see his eyes which he hides with the peak of his cap. His lyrics mostly deal with criminality, his African roots, racism and soccer. The 3 albums he's released so far form a trilogy on the theme of a big brother's role.
His stage name comes from his real name Youssef with the two syllables reversed.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.