Anzuelo literally translates to "fishhook" or "bait". It's an interesting word because it's not commonly found in song lyrics, especially in a romantic or flirtatious context.
In this song, the narrator sings, "Me le acerqué suspicaz y le tendí un anzuelo" (I approached her suspiciously and cast a hook/bait). Here, "anzuelo" is used metaphorically to describe a subtle, enticing move or a clever line used to attract someone's attention and draw them in, much like bait on a hook. It suggests a playful, strategic approach to flirting.
Babasónicos frame "Risa" as a pickup attempt at a party among strangers ("En la palestra de desconocidos" [In the arena of strangers]). The narrator moves in on someone, kisses her neck, and tries a line: "Vamos a fumar un porro ahí" [Let's go smoke a joint over there]. The hook keeps circling back to one plain compliment, "Me gusta verte reír" [I like watching you laugh], repeated so often it starts to feel less like flattery and more like a fixation.
By the bridge the mood turns. "La alegría llegó / Y sé que no dura para siempre" [Joy arrived / And I know it doesn't last forever] admits the whole flirtation is temporary before it's even over. The laugh he chased was never going to last, and he already knew it.