Rata de dos patas literally translates to "two-legged rat". It's a classic and powerful insult in Spanish, used to describe a despicable, worthless person by comparing them to the lowest of vermin.
This phrase is famously the title of an iconic song by Mexican singer Paquita la del Barrio. In "MAMIII", Karol G directly references Paquita, using this ultimate insult to put her ex in his place, making it a fiery and culturally rich expression of female empowerment.
Get ready for the ultimate breakup anthem! Becky G and KAROL G team up to deliver a powerful message to a toxic ex. This isn't a sad song; it's about empowerment and kicking someone to the curb who doesn't deserve you. They make it clear from the start: "Lo que no sirve que no estorbe" (What's useless shouldn't get in the way). They've completely cut him off, saying "No me vuelvas a llamar / Que hasta boté el celular" (Don't call me again / I even threw away my phone). The best part is the new phone number they offer him: "Llama 1-800-jódete" (Call 1-800-F***-yourself).
They don't hold back when describing him, even calling him a "Rata de dos patas" (Two-legged rat), a famous line from a classic song by Mexican singer Paquita la del Barrio. While he's out with someone new, they know he's still thinking about them: "Andas comiéndote a otra, pero estás pensando en mí" (You're hooking up with another girl, but you're thinking of me). But they have truly moved on. They're at the party, have new guys lined up, and are not looking back. As KAROL G says at the end, sometimes you don't get replaced by someone better, or even by someone "más rico" (hotter).