Amarre literally means a "tie" or "mooring", but in many Latin American cultures, it refers to a love spell or magical charm used to make someone fall in love with you.
In the song, the singer is so captivated that he says, "Pa' mí que me hiciste, mami, un amarre" (I think you've put a love spell on me). It's a dramatic and intriguing way to express an irresistible attraction, as if he's under her magical control.
Cris MJ brings pure Chilean party energy to this track, and he gets straight to the point: stop playing games and meet up. The hook revolves around a simple question: "Ahora, si tú eres la musa, ¿por qué me rehusa'?" ("Now, if you're my muse, why do you refuse me?"). He calls himself her devil ("yo soy tu diablo") and tells her she's both an angel and a devil too ("Tú eres una diabla y a veces ángel"). He is so hooked that he jokes she cast a love hex on him ("Pa' mí que me hiciste, mami, un amarre").
What makes this track fun to unpack are the sharp local slang words and flexes packed into the verse. When he calls her "una gatita chilena" ("a Chilean kitten"), he promises her rides on a Lamborghini yacht to strip down her Victoria's Secret underwear. Then comes the real street talk: "A ese longi dale moria" ("Ignore that fool" or "leave that sucker behind"). In Chilean slang, a "longi" is a foolish or clueless guy, and "dar moria" means leaving someone cold or ghosting them. Cris wants all the distractions gone so the two of them can disappear to a place where nobody can see them.