1. A great song: This is the most common usage. A "banger" is a song that is incredibly catchy, danceable, and generally awesome. It's something that you'd put on repeat and blast out of your speakers.
2. A great event: This usage is similar to the first, but applies to events like parties, gigs, or even just a night out. It's a good time, something you'd remember and tell your friends about.
3. A very good car: This meaning is less common but still used, referring to a car that's powerful, fast, and impressive. It's typically a high-performance or luxury car.
4. A very good meal: This is a newer and less common usage, but it can be used to describe a delicious and satisfying meal.
5. A fight or argument: In some circles, "banger" can refer to a very intense or heated fight. It's less common than the other meanings, but still used in some dialects.
The exact meaning of "banger" is often understood from context, but it always carries a positive connotation. It's something great, enjoyable, or impressive.