Mamajuana refers to a traditional Dominican alcoholic drink made by steeping rum, red wine, and honey with tree bark and herbs. It's known for its unique flavor and is often considered an aphrodisiac.
In the song, the lyric "Cada, vez que, sale, con sus amigas para mamajuana" suggests that the woman goes out with her friends to drink mamajuana, implying a night of fun and perhaps a bit of wildness. This word is interesting because it's a specific cultural reference that adds a unique flavor to the lyrics, making it stand out from more common party drinks.
"Rosè" is Arcángel and De La Ghetto trading verses over a DJ Luian and Mambo Kingz beat, and the title works two ways at once: it's the rosé wine flowing at the party, and it's the woman the whole song is written for.
The first verse is a quick rags-to-riches boast: he used to have nothing, took a risk, and doubled it. That hustle sets up everything that follows: money and rosé are what buys the confidence he's showing off with. The hook repeats "pasto, perco y Rosè" (weed, coke, and rosé) as the shorthand for that lifestyle - excess as proof he made it.
The second half turns fully toward the woman: her effect on him, described in increasingly over-the-top compliments, ends the song on the same theme the hook started - wanting to enjoy the good life with her tonight.