Chimba is a cornerstone of Colombian slang that you absolutely need to know! While its meaning can change with context, in this song it's used to mean something is really 'cool' or 'awesome'.
Feid reminisces about "lo chimba que es ver amanecer" (how cool it is to watch the sunrise) with his ex-lover. Learning this word is a perfect first step into understanding the unique slang that makes modern Latin music so fun.
This song is all about that feeling after a sudden breakup when you're just stuck replaying every memory. Feid kicks it off by remembering all the promises that were left behind in an apartment in Brickell, a fancy neighborhood in Miami. He's thinking about the good times, like how they discovered "lo chimba que es ver amanecer" (how cool it is to watch the sunrise), a very Colombian way to say it, thanks to Feid! But he also remembers the bad signs, like taking her to expensive restaurants like Gekko and Papi Steak where she didn't even want to eat.
He's completely hung up on her, asking "Mami, ¿cómo me olvidas?" (Baby, how do you forget me?) after they shared some seriously intense moments. He tries to move on by going "de cacería" (out on the hunt), but it's a total disaster. He even ends up at the same hotel with a new girl, which is just awful luck. The whole thing feels unfinished because, as he says, "Está cabrón que ni nos despedimos" (It's messed up that we didn't even say goodbye). He's left hoping he can use her forgotten jacket and Yeezys as an excuse to see her again. It's a perfect mix of heartbreak and trying to act tough.