The song "Decir Amigo" by Joan Manuel Serrat is about the importance of friendship and the memories associated with it. It reflects on the experiences and emotions shared between friends throughout life. The lyrics describe various elements that are often associated with friendship, such as games, school, the neighborhood, and shared experiences. It mentions specific places and moments, such as Sunday's light in the neighborhood, the taste of certain foods, and fights over girls in specific locations. The song also evokes nostalgia and the passage of time. It talks about the memories and experiences of youth, capturing the longing for the past, and the feeling of being far away from it. It mentions the significance of friendship in one's life, the importance of companionship and support in both good and bad times. Overall, "Decir Amigo" celebrates the deep bond of friendship that transcends distance, time, and circumstances. The song portrays friendship as a source of warmth, love, and understanding.