Idioms and Phrases with bang away
Strike repeatedly, as in Mary is always banging away on the piano, or The doorbell must be broken; see who is banging away at the door. [First half of 1800s] Also see bang out.
Go ahead; begin or continue. This slangy imperative usually calls merely for energetic action, as in You can start without me—bang away. Also see go to (it), def. 3.