Labia is a fantastic slang word for "smooth talk," "the gift of the gab," or a special kind of silver-tongued charm used to persuade or seduce someone.
In "200 COPAS," KAROL G describes a manipulative ex who has "una labia... digna de recuperarte" (a smooth-talk... worthy of winning you back). It perfectly captures the ex's ability to use charming words to cover up his bad behavior.
Learning labia is great because it's a single, memorable term for a person who always knows just what to say to get what they want.
Ever had to stage an emergency intervention for a best friend stuck on someone terrible? That is exactly what Colombian superstar KAROL G does in "200 COPAS". She starts by grabbing the microphone in a restaurant where people are just trying to eat dinner, zeroing in on a girlfriend who bites her lip trying not to cry. Karol gets straight to the point: "Amiga, deja solo a ese payaso" ("Girlfriend, leave that clown alone"). She calls him out on his rinse-and-repeat cycle of cheating, playing dumb, and buying gifts to win forgiveness. Karol is done being polite about it, telling her friend that "el pedazo de mierda es él y no soy yo" ("he's the piece of crap, not me").
Her cure for this endless loop of misery is simple: down all two hundred drinks left behind the bar ("las doscientas copas que hayan en la barra") and scream along to her own famous breakup anthem, "Tusa", until everyone clears out. She sprinkles the track with colloquial Colombian speech like "labia" (smooth, manipulative talk) and the affectionate, everyday address "marica" (used here as "dude" or "girl"). It is a blunt, rowdy, tough-love pep talk disguised as a drinking song, made specifically for pulling your favorite person out of a bad relationship.