Schmuck translates to "jewelry" or "ornaments". While it's a common word, its repeated appearance in the song, especially in the context of wealth and status, makes it particularly interesting here.
Loredana uses "Schmuck" to highlight her success and the material possessions that attract others, singing "Dir gefällt mein Schmuck" (You like my jewelry) and mentioning "Eliantte, eine Mio nur für Schmuck" (Eliantte, a million just for jewelry). It's a key element in conveying the song's themes of independence and financial power.
"Kein Hunger" means "No Appetite," and the title is the whole plot: someone won't stop asking her out, and she isn't interested. Loredana opens with a flat no, "Nein, du kriegst nicht meine Nummer" ["No, you're not getting my number"], then kills the dinner offer before it lands, "Was für essen gehen? Ich hab' keinen Hunger" ["What, going out to eat? I don't have an appetite"]. That's the hook, and it comes back three times because her answer never changes.
The verses spell out the refusal. She's clocked the type who talks big with nothing behind it: "An meinen Kontostand kommst du leider niemals ran" ["You'll never get anywhere near my bank account"]. UFO361 takes the second verse from the other side, a guy offering a Birkin bag and a dog and still gets nothing better than "Mein Cash ist bunt" ["My cash is colorful"]. None of it moves her. By the last chorus, she's still not hungry.