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.
Chilean artist Cris MJ isn't playing around in this track. "No Ponga Excusas" is a direct plea to a woman he's involved with. He's tired of waiting and wants to get together right now. He asks her, "si tú ere la musa / ¿Por qué me rehusa'?" (if you are the muse / Why do you refuse me?), showing he's confused by her hesitation, especially since he wants to "repetimos lo de ayer" (repeat what we did yesterday).
He mixes sweet talk with a much more intense, demanding side. One moment he says, "Sabes que te amo" (You know that I love you), and the next he calls himself her devil. He sees her as both a "diabla y a veces ángel" (she-devil and sometimes an angel), and feels so drawn to her that he thinks she cast a spell on him. The song is full of classic reggaeton boasts about a luxury lifestyle, offering her a "yate Lamborghini" (Lamborghini yacht) as a place for them to escape and be together. Ultimately, his message is simple and blunt: stop making excuses and let's be together.