Mariposas literally means "butterflies". It's a key word in a very common romantic expression in Spanish: sentir mariposas en el estómago, which is the equivalent of "to feel butterflies in your stomach" when you're in love.
This song gets its title and emotional core from this idea. The singer expresses his heartbreak with the line, "Hoy ya no vuelan mariposas" (Today, the butterflies don't fly anymore), creating a powerful and poetic image that the magic and excitement of love are gone.
Ever been on a packed dance floor, completely miserable because a specific song came on? That is the exact mood in "Mariposas". sangiovanni teams up with Spanish singer Aitana for an energetic dance track about missing an ex so badly that partying feels wrong. It kicks off right at the DJ booth with "DJ, no ponga la canción / Que cada vez que suena, se me rompe el corazón" ("DJ, don't play that song / Because every time it plays, my heart breaks"). Without their partner, the whole club experience falls apart: "Bailar sin ti, no sé bailar / La música no suena igual" ("Dancing without you, I don't know how to dance / The music doesn't sound the same").
The central metaphor plays on butterflies. While English speakers talk about getting "butterflies in your stomach" when falling in love, the chorus laments that the magic has vanished: "Hoy ya no vuelan mariposas / Ya no quedan rosas" ("Today butterflies no longer fly / There are no roses left").sangiovanni also drops a verse in his native Italian, comparing his attraction to moths drawn toward lightbulbs: "Volano farfalle sulle lampadine / Attratte come fosse la luce del sole" ("Butterflies fly around the lightbulbs / Attracted as if it were the sunlight"). There is also a very relatable, messy honesty in lines like "Anoche sí lloré / Pero no lloré más / Bueno, por lo menos traté" ("Last night I did cry / But I didn't cry anymore / Well, at least I tried"). It balances club-ready beats with the quiet sting of a ruined night.