Whiskacho is a playful, slang term for "whiskey." It's a great example of how Spanish speakers can create informal, endearing versions of words by adding suffixes like "-acho."
In the song, it highlights the laid-back and celebratory vibe of the characters, who enjoy a good drink with their friends. It's a fun, less common word that adds flavor to the lyrics and shows a more casual side of the language.
Almost every line of SUPERCHARGED describes one man, and never by how he feels — only by what he does. He runs the boulevard flat out, "Por las calles me miran zumbando en mi supercharged" ("On the streets they see me speeding in my supercharged"), and he is ready the second work comes up: "Si sale una misión / Siempre atento el viejón" ("If a mission comes up / The old man's always attentive"). Bag in hand, engine already running, waiting to be told where to go.
The praise keeps alternating between showing him off and vouching for him. He toasts with his friends over whisky, he likes a bet and an afternoon at the shooting range, and the same verse calls him careful — "No hace nada al aventón" ("He doesn't do anything carelessly"). The band stamps its own name into the middle of it, "Ya se sonó la Marca Registrada" ("Marca Registrada has already made itself heard"), then "Yey, su compa Tom, uah" ("Yey, his buddy Tom, uah") hands the next verse to Tombochio. He leaves the way he arrived, at speed: "Maullando en la Supercharged" ("Roaring in the Supercharged").