Trampolín literally means "trampoline." It's an unexpected and playful word to find in a salsa song, making it instantly memorable.
In the context of the lyrics, the singer uses it metaphorically to describe how she felt used. She sings, "Y si acaso ha sido en ti Trampolín de piscina," implying that she was merely a stepping stone or a 'trampoline' for someone else to jump to a better life, only to be left behind. This clever use of a common object in a metaphorical sense gives the word a deeper, more poignant meaning within the song.
El Gran Combo's "Trampolín" tells a story of a woman reflecting on a past relationship where she felt used. She describes how she took in her partner when he was at his lowest, feeling like a "prisionera perdonando al que se trata de un fracaso" [a prisoner forgiving someone who is a failure], believing in his promises of love. She recalls finding him desperate, burdened by "el dolor y la amargura de su vida fracasada" [the pain and bitterness of his failed life], and offering him refuge.
However, things changed once he found his footing. She sings, "y hoy que tienes otra vida ya me siento liberada" [and now that you have another life, I feel liberated], suggesting his success meant her freedom from the burden of supporting him. She realizes he didn't keep his promises, and there's nothing left of their love. Despite this, she doesn't hold a grudge, saying "más no te guardo rencor" [I no longer hold a grudge]. The most impactful line is her realization that she might have just been a "trampolín" [trampoline] for him, a stepping stone to a better life. It's a bittersweet farewell, wishing him happiness even though she was left with the pain.