Fünftklässler literally translates to "fifth-grader". It's an interesting word because it refers to a specific age group in school, which isn't commonly found in rap lyrics.
In the song, Kurdo uses this word to highlight his early dominance and toughness, stating, "Ich war der Fünftklässler, der die Achtklässler schlägt" (I was the fifth-grader who beat up the eighth-graders). This line emphasizes his street credibility and rebellious nature from a young age, making it a memorable and unique choice in the context of the song.
Kurdo's "Kein Kiffa" is a powerful declaration of his identity as a "Gangbanger" and a "Kanake" (a German slang term for someone of non-German descent, often used pejoratively but reclaimed by some). He makes it clear he's not a casual drug user, stating "Ich bin kein Kiffer, ich bin Gangbanger" [I am not a stoner, I am a gangbanger].
This track is a direct challenge to the German rap scene and society at large. Kurdo sees German rap as a "Kinderbuch" [children's book] compared to his own hardcore style. He brags about his aggressive behavior, like "In deinem Garten trete ich die Tulpen kaputt" [In your garden I kick the tulips to pieces] and even claims to trick the police. He's proud of his immigrant background, saying "Wir sind aus dem Ghetto, wir haben alle Macken. Wir sind Kanaken, püff auf dein'n Nacken" [We are from the ghetto, we all have flaws. We are Kanaken, puff on your neck]. He even provocatively calls himself "Taliban" despite his name not sounding Arabic or Islamic, just to make a point about stereotypes and identity. It's a blunt, in-your-face anthem about street credibility and rejecting mainstream expectations.