ergon
noun
A unit of work equal to the output of a single hour of moderately focused work, half an hour of highly-focused “in the zone” work, two hours of occasionally-distracted work, or a full day of unmotivated work.
Hey, don’t take it personally, but I’m going to go hide in my office with my headphones on for a while. I have a three ergon task and only two hours to do it.