Cowboyzão is an augmented form of "cowboy", meaning "big cowboy" or a "macho cowboy". The suffix "-zão" is an augmentative in Portuguese, often used to emphasize size, intensity, or even affection.
In the context of the song, it highlights the rugged, charismatic, and perhaps slightly exaggerated persona of the male protagonist, contrasting him with the "patty da cidade" (city girl) and emphasizing his country charm and appeal.
Get ready to sneak out with Luan Pereira and Mc Daniel in "ENTRA NA DEFENDER"! This song is all about a secret romance between a "patty da cidade" (city girl) and a charming country boy. He's keeping the music low so he doesn't wake her dad, who has no idea what his "princesa" (princess) is capable of!
The lyrics paint a picture of this unexpected couple: she's getting a little wild, with "De Pandora riscando-a pelo corpo todo" (Pandora scratching her all over her body), and he's a "cowboyzão cheirosão, de botona de couro" (big, fragrant cowboy, with big leather boots) who knows how to make her fall for him. He's also a "playboy de chapéu" (playboy in a hat) with a "cordão de ouro" (gold chain). The chorus is an invitation to adventure: "Entra na Defender / Vai, me surpreende / Mostra o que 'cê faz que eu te levo ao céu" (Get in the Defender / Go on, surprise me / Show me what you do and I'll take you to heaven). It's all about keeping their fun "em OFF, o melhor ninguém descobre" (off the record, nobody discovers the best part). And that "Renk renk renk"? That's the sound of his Defender, ready for their secret escapades!