Fantabuloso is a playful portmanteau, a creative blend of two Spanish words: fantástico (fantastic) and fabuloso (fabulous). It's a perfect example of modern, expressive slang you won't find in a textbook.
In the song, Peso Pluma uses this word to describe his incredibly extravagant lifestyle. It's an energetic and memorable word that captures a feeling so good, one normal adjective just isn't enough!
Peso Pluma's "London" is a whirlwind tour of a life lived at maximum volume. He's not just rich, he's on another level, bragging, "Aquí es Ferrari, no Mercedes-Benz" (Here it's Ferrari, not Mercedes-Benz). The song is packed with hyper-specific details of this luxury, from dining at Boutary in France before jetting off to London, to drinking super-expensive Louis XIII cognac out of a simple red cup. It's a lifestyle of pure excess, where he declares, "El exceso me llama" (Excess calls to me).
But it's not all champagne and designer watches. There's a constant edge of danger and power. He casually mentions "Al tiro las armas largas" (Long guns at the ready) and compares his crew to James Bond. He even compares himself to King Midas, turning everything he touches to gold. The boasts get wild and funny, like when he offers to buy a woman her own OXXO convenience store. It's a snapshot of a man who feels untouchable, living a life that's part action movie, part luxury catalogue, and 100% over-the-top.