Patrociné comes from the verb patrocinar which means "to sponsor" or "to patronize", as in a business or artistic sense. In the song, however, this formal word is used with heavy sarcasm and a colloquial sting.
When Xavi sings, “Malamente, mamita, te patrociné” (Wrongly, baby, I sponsored you), he's bitterly implying he paid for her lifestyle during their relationship. This clever twist on a common word perfectly captures the singer's feeling of being used, making it a memorable and nuanced term to learn.
This song is a brutally honest story about a messy breakup. Xavi kicks things off by telling us he's spending his nights getting wasted, watching the hours pass on his Cartier watch. He's blunt about it, singing, "Ando valiendo verga por tu culpa otra vez" (I'm a mess because of you again). He's not just sad, he's angry, and he feels like he wasted his money on her, saying, "Malamente, mamita, te patrociné" (Badly, baby, I sponsored you).
He's trying to get over her with a wild lifestyle of "Polvos, Barbies y tequila" (Powders, Barbies, and tequila), but it's not working. He keeps pulling all-nighters because "no sales de mi vida" (you won't get out of my life). What really seems to hurt is how she left without a word: "Ni una puta despedida" (Not even a fucking goodbye). He calls himself a "pendejo" (idiot) for thinking it would be forever, but even with all the anger, he admits he's still stuck on her, repeating the line, "no te olvido, todavía" (I still don't forget you).