bangˈing adjective

1. Dealing blows
2. Overwhelming, very great (informal)
3. (also bangˈin’) great, very good (slang)

bangˈster noun (obs Scot)

1. A violent person
2. A braggart
3. A victor

bangˈ-up adjective (archaic sl)

In the height of excellence or fashion

bang goes (informal)

That's the end of

bang off (informal)

Immediately

bang on (informal)

1. Right on the mark
2. To speak at length, esp assertively and repetitiously

bang one's head against a brick wall

To waste one's time in unproductive effort

bang out

1. To produce in a hurry (eg a piece of writing)
2. Of printers, to mark someone's retirement or the end of someone's apprenticeship by banging tables, etc with mallets, etc

bang to rights

1. Orig, caught red-handed (criminal sl)
2. Certainly, absolutely, no doubt (informal)

bang up (slang)

1. To imprison, specif to shut up in a cell
2. To knock about, beat up (US)

Big Bang

1. The hypothetical explosion of a small dense mass which most scientists believe (the Big Bang theory) to have been the origin of the universe
2. The changes in the system and rules of the British Stock Exchange instituted on 27 October 1986, in effect deregulating many of its practices and abolishing the distinction between jobbers and brokers

go with a bang

To go well, be a success