Puñales literally translates to "daggers". It's a dramatic and powerful word that you don't often hear in everyday conversation, making it very memorable.
In the song's iconic opening line, "Flaca, no me claves tus puñales por la espalda" (Skinny girl, don't stab your daggers in my back), Calamaro uses this word as a potent metaphor for betrayal. It creates a vivid image of being hurt deeply by someone you trust, setting the emotional and dramatic tone for the entire song.
Argentina's Andrés Calamaro opens this track with dramatic, wounded swagger, pleading with an ex: "Flaca, no me claves tus puñales por la espalda" ("Skinny girl, don't stick your daggers in my back"). Calling someone flaca is a classic Argentine term of endearment, though he follows it with pure melodrama, claiming those deep backstabs do not even hurt anymore: "tan profundo no me duelen, no me hacen mal" ("so deep they don't hurt me, they do me no harm"). He sifts through the wreckage of a burned-out romance, looking back on golden days ("tiempos dorados") that he literally left buried in a closet: "me dejé nuestros abriles olvidados en el fondo del placard" ("I left our Aprils forgotten in the bottom of the closet"). In Argentina, people say placard for a built-in wardrobe, and abriles evokes their shared springtimes, hidden away where guests stay.
What makes the song stick is how painfully petty and contradictory breakups get. He backs his partner into an impossible corner, snapping, "No me mientas, no me digas la verdad, no te quedes callada, no levantes la voz, ni me pidas perdón" ("Don't lie to me, don't tell me the truth, don't stay silent, don't raise your voice, don't ask for forgiveness"). There is zero winning that argument. Then, right after acting like the bruised victim, he admits his own pathetic side: "he sido un perro compañero... que aprendió a nadar y a volver al hogar para poder comer" ("I've been a companion dog who learned to swim and return home just to eat"). It is cynical, slightly self-deprecating, and remarkably honest about staying in a dead relationship just for room and board.