Pereza translates to "laziness" or "idleness". It's a word that captures a specific human trait, often with a slightly negative connotation, but used in an interesting way in this song.
In the lyrics, Sebastián Yatra sings, "Controlar me da pereza" (Controlling gives me laziness/I'm too lazy to control myself). He uses it to express a reluctance to control his emotions or actions, especially in love, suggesting a desire to live freely and spontaneously, even if it leads to heartbreak. This makes the word quite memorable and thought-provoking in the context of the song's narrative.
Yatra drinks his way into a memory and ends up alone in the city she picked. "Anoche bebí y me acordé de ti" (Last night I drank and I remembered you) opens it, and the line after explains the trip: she used to talk about going to Paris. He went. She didn't. The best image in the song is a wound he keeps disinfecting on purpose, "Y una herida que me arde si le echo alcohol" (And a wound that burns if I pour alcohol on it), which is also a quiet joke about the drinking. Then the chorus switches language on you: "J'suis désoleé desde París" (I'm sorry, from Paris), an apology in French from her city.
The middle verse is where he stops feeling sorry for himself and starts arguing with himself instead. "Tú eres una más me lo digo yo" (You are just another one, I tell myself) is the lie, and he gives it up a few lines later with "Porque a mí también me pasa que la quiero" (Because it happens to me too, that I love her). Underneath sits a couplet that only works in Spanish, "Controlar me da pereza / Controlar te da pobreza" (Controlling makes me lazy / Controlling makes you poor), one rhyme doing the work of a whole argument. Then he runs out of things to say and repeats "Desde París" (From Paris) until the track fades, which is a fair description of standing somewhere beautiful with nobody to tell about it.