If a Song is extremly tight or just unbelivably awesome. It is a banger

a badass party, or big celebration

An intense party, which involves large amounts of drinking, beer pong, and plenty of skanks to grind on. Always leaving the house a total mess.

A home made prison shank, a sharpened tooth brush or anything that is sharpened to a point that is similar to an ice pick.

An old, delapidated worn out car or less commonly, van.
It will usually have been around the clock and will be rusty and clapped out.
Good examples of bangers are old reps cars which have been to Mars and back.
Most Private Hire Taxis are bangers and they are also used to race around dirt tracks for fun.

a slang term used for a gun

a girl with an attractive body