It's in the same group of eye rolling phrases for me such as "heads down" e.g. "I'm going to be heads down working on X tomorrow so I won't be available on Slac

It's in the same group of eye rolling phrases for me such as "heads down" e.g. "I'm going to be heads down working on X tomorrow so I won't be available on Slack". Something seems off with your priorities and expected responsibilities if you need to declare this. For me, just take the time you need to focus. I always see colleagues say this right before the end of a sprint when trying to get a feature finished or something.