In boxing we use "light work" as easy / little effort, i.e. "3 * 2 minute rounds, just light work" or as a derogatory term, pretty sure that is fairly universal at this point.
For sure, that was well stated. However, I will say, it must be universal to the boxing world, because again, never heard it used like that, though I could assume it means easy/ little effort. At least not enough for me to remember. Also, That term doesn't necessarily need to be used in boxing. Someone could just say that instead of, slow day, little bit of work, some work, etc.
If you're wondering why I care enough to even reply....a large part of me isn't sure why either.