Voltastomaco is a compound word that literally translates to "turn stomach". It's a vivid and somewhat informal term used to describe something that is nauseating or disgusting.
In the song, Dargen D'Amico uses this word to powerfully convey the protagonist's deep disgust and disillusionment with their partner's manipulative behavior, calling them "Voltastomaco alla moviola" (stomach-turning in slow motion). It's a strong, evocative word that captures the emotional intensity of the lyrics.
Dargen D'Amico builds this song around one image and never lets go of it: a doll, spun and dropped. The hook states it directly — "Tu mi fai girar, tu mi fai girar" ("You make me turn, you make me turn"), then "Come fossi una bambola" ("Like I was a doll"), then "E poi mi butti giù, poi mi butti giù" ("And then you throw me down, then you throw me down"). Picked up when it's convenient, discarded once the game is over — that's the whole relationship in three lines.
The second half turns the same image into a refusal. "Tu non mi metterai" ("You won't put me"), he says, "Tra le dieci bambole" ("Among the ten dolls"), "Che non ti piacciono più" ("That you don't like anymore") — he won't be filed away with the other discarded toys. By the bridge the softness is gone: "Sei la merda nei parchi" ("You're the shit in the parks") and "Ami nel verso contrario" ("You love in the opposite direction") land as flat accusations, not metaphors anymore.