Membrillo literally translates to "quince", a fruit similar to a pear. However, in Spain, it's a colloquial term used to call someone a dunce or an idiot!
In this powerful rock anthem, the line "No seas membrillo y permite pasar" (Don't be a dunce and let me pass) is a direct and forceful command. The singer is using this unique piece of slang to tell someone to stop being stubbornly foolish and get out of his way.
If someone in your life is constantly stirring up drama and refuses to pick a lane, Héroes del Silencio wrote an anthem for you. Frontman Enrique Bunbury aims this Spanish rock blast straight at an opportunist chasing power: "Te puedes vender / Cualquier oferta es buena si quieres poder" ("You can sell yourself / Any offer is good if you want power"). The lyrics call out a person who talks too much, shows up uninvited, and suffocates everyone around them. Being stuck "entre dos tierras" ("between two lands") leaves no room to breathe, caught in total indecision and compromise while refusing to take responsibility for the mess.
Bunbury does not hold back on blunt insults and harsh warnings. He tells them, "No seas membrillo y permite pasar" ("Don't be a quince fruit, let people pass"). Calling someone a "membrillo" (quince) in Spain is classic slang for calling them a blockhead or a fool. He also warns that backing out means erasing a messy track record ("tienes muchas huellas que borrar" [you have a lot of footprints to erase]), while stubbornly pushing forward means swallowing a ton of dirt ("tienes mucho barro que tragar" [you have a lot of mud to swallow]). In the end, he washes his hands of the whole situation with a sharp, repeated demand: "Déjame / Que yo no tengo la culpa de verte caer" ("Leave me alone / It's not my fault if I see you fall").