bang away

1. 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.

2. 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 .