Tumbado literally means "fallen" or "laid down," but in the context of this song and the genre of corridos tumbados, it takes on a much cooler meaning.
It describes a style, an attitude, and a way of life that is relaxed, confident, and authentic. When Justin Morales sings, "Y ahora véanme bien loco y bien tumbado," he's inviting you to see him as someone who is wild, but also effortlessly cool and true to his unique style.
Justin Morales comes straight out the gate with no filter in "Desde Morro" (Since I Was a Kid). The opening line tells you everything about how he was raised: "Desde morro me enseñaron a ser bien cabrón" [Since I was a kid, they taught me to be tough as nails / a badass]. Mexican slang is everywhere here. He calls himself a chavalón [young guy] who listened closely to his parents. His mom taught him respect, but his dad gave him the blunt rule he still lives by: "pórtate mal con quien sea un culero" [be bad to whoever is an asshole]. Life threw heavy hits at him, and he admits those knocks permanently changed who he was, turning him into the guy you see now: "bien loco y bien tumbado" [crazy and laid-back in that corrido tumbado style].
Beyond chasing "pacas verdes" [green stacks of cash] through pure hustle, this track is an intimate family roll call. Justin carries a heavy loss on his chest: "Mi hermano que en paz descanse / Siempre fue un chingón" [My brother, may he rest in peace, was always a badass]. He shouts out his brother Brandon, whose ink runs right up to his neck ("Carnal Brandon tatuado hasta el cuello"), and salutes his clica [crew]. To him, close friends count as brothers even if they came from different mothers, though he can still count the truly loyal ones on his fingers ("Los reales yo los cuento con los dedos de mis manos"). It ends with a cold look back at everyone who doubted him, proving that starting from zero every single day actually pays off.