Bandolera is the feminine form of bandolero, which literally translates to "outlaw" or "bandit". It evokes a romantic image of a rebel from old stories, someone who lives outside the law.
In "Bichiyal," Bad Bunny uses bandolera to describe a woman who is fiercely independent, confident, and plays by her own rules. She's part of a "corillo de bandoleras" (a crew of female outlaws), suggesting they are a powerful group who do what they want and won't be tied down.
Bad Bunny and Yaviah give us a total party anthem with "Bichiyal," and it's all about a specific type of woman. The main idea is right there in the hook: "Ella está casi, casi soltera" (She's almost, almost single). She might technically have a boyfriend, but she's not letting that stop her from going out with her friends, her "corillo de bandoleras" (crew of outlaws), and dancing all night. She has a line of guys waiting for her and she really doesn't care if her partner finds out what she's up to.
The song coins the term "bichiyal," a mix of Puerto Rican slang words to describe a bold, independent party girl. She's someone who "no quiere anillo, ni s-o-g-a" (doesn't want a ring or a rope) because she doesn't want to be tied down. Bad Bunny describes her as a wild girl who likes to ride ATVs and scream, someone who is completely in control of her own fun. It's a celebration of a woman who lives by her own rules, seeking freedom and a good time over a committed relationship.