Feuerberg literally translates to "mountain of fire" and is a poetic way to say volcano. It's a vivid and somewhat dramatic compound word that isn't commonly found in everyday German pop songs.
In the song, the singer expresses intense longing and passion by saying, "Hab' so'n Feuerberg im Bauch" (I have such a mountain of fire in my stomach). This metaphor powerfully conveys overwhelming emotions, like a burning desire or an erupting passion, making it a memorable and enticing word for learners.
The singer runs away after a fight. "Einfach nur weg, nahm den nächsten Flug nach Rom" (Just away, took the next flight to Rome), she says, sure she can cope alone. The first night is fine; "Doch die zweite tat schon weh" (But the second one already hurt). Sitting in Roman cafés, "mittendrin und doch allein" (right in the middle and yet alone), she admits the quarrel was "so ein dummer Streit" (such a stupid fight) and only three days old.
The chorus is her confession: "Keiner küsst mich so wie du" (Nobody kisses me like you). She has "so'n Feuerberg im Bauch" (such a fire in my belly), the flutter won't stop, and "Ich bin süchtig, ich geb's zu" (I'm addicted, I admit it). By the second verse she has decided: "Und ich nehm' den nächsten Flieger hin zu dir" (And I'll take the next plane to you).