Back at it (again) phrase informal
Doing something again, usually something negative or unpleasant
Well, the noise from the neighbors. The construction must be back at it again.
I tried to cease consuming junk food, but I'm already back at it.
David has stopped smoking for 1 week and now I see he is back at it again.
To say the same thing repeatedly
To make someone learn something by repeating it many times
1. Constant movement or travel between places or locations
2. Used to refer repeated discussions or thought that doesn't make any progress
To say or do the same thing one has previously said or done