Wiktionary
and be done with it
phr. (context idiomatic English) (non-gloss definition: Used to terminate discussion or delay with a call to action)
Usage examples of "and be done with it".
Mike summoned the bartender from her jihad on flyspecks, ordered another round of Coors, and offered the opinion that Uncle Sam ought to just wade in and take the oil fields away from the Arabs and be done with it.
But I cannot see why you didn't tell your friends about Cecil and be done with it.
Time to do it and be done with it, now that I felt rested and somewhat alert.
Captain Calhoun, perhaps it would best serve all concerned if I were simply turned over to the Selelvians now and be done with it.
The ideal situation would be for us to lock onto the ambassadors via their life readings, transport them up and be done with it.