Vipera translates to "viper," a type of venomous snake. It's an intriguing and somewhat unexpected word to find in a pop song, making it memorable.
In the song, Cesare Cremonini uses it to describe a lover's intense and almost dangerous passion: "cominci a mordere, sembri una vipera" (you start to bite, you seem like a viper). This vivid imagery conveys a powerful, untamed, and alluring aspect of their connection, hinting at a love that is both captivating and a little wild.
"Chimica" is Cesare Cremonini's ode to the pull between two people that feels more like instinct than choice.
He describes the giddy, almost animal side of attraction: catching a stranger's eye across a crowd, mistaking someone in a supermarket line for his girlfriend because she never leaves his thoughts, and feeling the air itself change when she's near.
The chorus keeps landing on the same idea: people call it chemistry, but for him it's simpler and messier than that word suggests. It's an obsession he keeps coming back to, one that doesn't fully make sense and doesn't need to.