bang

1. A sudden loud noise, as of an explosion.
2. A sudden loud blow or bump.
3. Informal. A sudden burst of action: The campaign started off with a bang.
4. Slang. A sense of excitement; a thrill: We got a bang out of watching the old movies.

1. To strike heavily and often repeatedly; bump.
2. To close suddenly and loudly; slam.
3. To handle noisily or violently: banged the pots in the kitchen.
4. Vulgar Slang. To have sexual intercourse with.

1. To make a sudden loud, explosive noise.
2. To crash noisily against or into something: My elbow banged against the door.

1. Exactly; precisely: The arrow hit bang on the target.
2. Suddenly; abruptly: cut the conversation bang off.

bang away

1. To speak or ask questions in a rapid, aggressive manner: reporters banging away at the official during the press conference.
2. To work diligently and often at length: banged away at the project until it was finished.

1. To damage extensively: banged up the car.

bang for the (or one's) buck

1. Value returned for investment or effort.

[Probably from Old Norse bang, a hammering.]