Good morning to all our readers. The temperature today is 39C with the humidity and it's only 11am.
Today's phrase is "back at it".
This means that you have resumed (started again) doing something, and in many cases it is something you don't enjoy.
Example 1
A. Hey Bob, I haven't seen you for a while.
B. Yah, it's been a few weeks. Me and the family were on vacation in Australia. We had a wonderful time, but back at it on Monday morning.
(Meaning he starts back to his regular routine of work and life from Monday morning)
Example 2
I have to get back at it if I'm going to lose weight.
(Meaning he has to continue his diet)