Bacalao is the Spanish word for "codfish," a common food item. However, in this song and in some Caribbean slang, it's used as a colorful insult.
Calling someone a bacalao can imply they are undesirable or have a bad smell, much like dried and salted cod. It's a prime example of how everyday words can take on completely new, metaphorical meanings in slang, making it a fun and memorable word to learn.
Dominican dembow star Yailin la Mas Viral comes swinging in "Creta Seca", and she does not pull a single punch. The entire track is a high-octane verbal beatdown aimed at rivals she looks down on. She repeats the phrase "¿Pa' que? Pa' que respete" ["For what? So you show some respect"], treating her harsh words like discipline—literally telling people to "saquen lo fue'te" ["bring out the whips"]. When she calls someone "cuero ruyio" ["broke hustler/prostitute"], she is using Dominican street slang that mocks someone for having both bad intentions and zero money to show for it.
Her insults get hilarious and downright ruthless in the verse. She calls her rival's intimate area "creta seca" ["dry parts"] and jokes that "le dicen el bacalao" ["they call it the dried cod"] because it went through too much wear and tear: "Fue que se cansó, de pasas por to' lo lado" ["It just got tired from going everywhere"]. Meanwhile, Yailin brags that hers is "bendecido" ["blessed"] and claims that nobody ever leaves her. It is loud, rude, and full of bragging rights, daring anyone in her way to step up when they clearly cannot match her pace.