Banger

[Becky]

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

[Rihanna]

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.

[Rihanna]

a badass party, or big celebration

[Becky]

a gangster/thug

[Rihanna]

a girl with an attractive body

[Britney]

a gun

[Lanell]

A sausage.

[Rihanna]

[Scoring] a goal from [distance] (25 [yards] ) in Football (soccer)

[Jessica]

something great, [a hit] or a [classic]. It can be [a song], video, or event

[Magaret]

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.