The noise you hear when a young couple are having a good hard shag next door

Part of the refrain of one of rammstein's songs, Feuer Frei!.

something that is extra-banging (fantastic, delicious, wonderful, awesome)

A particular state of someone's hair after sex wherein one's face is partially obscured by scraggly bangs as a result of the wild lovemaking.

Something you say before you give your boy a slap ass. A friendly gesture that shows inclusion.

Bang or Bang Bang is commonly used to refer to the drug Cocaine and it's use. This use originates from the famous catch phrase of the wrestler 'Cactus Jack' and is an extension of the previous use of Bang in the related area (ie; 'Let's just bang a few more lines before we go out.' or 'bang out a couple of lines and then we'll get going!'

You bang’em, then you shoot’em. Get it? Bang bang ;)