Palpitar means 'to beat' or 'to throb', specifically referring to a heart or pulse. While 'latir' is a common verb for a heart beating, palpitar often carries a more intense, noticeable, or even anxious sensation, making it more evocative.
In "Noche De Relajo," the lyrics say, "Tú me haces que mi corazón empiece a palpitar" (You make my heart start to beat/throb). This beautifully captures the feeling of excitement and strong emotion the singer experiences when thinking about or being with this person, making it a memorable and romantic expression.
This song drops you right into the middle of a party night that's just getting started. Ivan Cornejo sets the scene with his friends, saying, "Con mis compas por un lado, bien a gusto disfrutando" (With my friends by my side, enjoying ourselves). The vibe is relaxed but hazy, as he sings that his mind is taking off and time feels like it's both flying and slowing down at once. It's a perfect description of being young and just chilling at a party.
Then, he sees someone. The whole mood of the song shifts to focus on this one person who has completely captivated him. He admits, "No puedo parar de mirar a tus bellos labios" (I can't stop looking at your beautiful lips) and feels so stuck that he says, "Atrapado en la silla no me puedo levantar" (Trapped in the chair, I can't get up). He's so smitten he can't even figure out how to say hello, confessing, "Tú me haces que mi corazón empiece a palpitar" (You make my heart start to beat faster). It's all about that moment at a party when you're a little drunk, good music is playing, and you see someone who makes your world stop.