There is a big difference between being lazy and acting lazy in my opinion.
You can perfectly act lazy every now and then. I even think it is good when you do. I'm back from a three week holiday where I acted lazy quite a lot. It made me recharge my battery and come up with some creative ideas.
But saying you are lazy isn't a good thing I think. I also never told my kids they were bad, but that they acted bad. It's a complete other thing.
Yep, that's the down time and relaxation I mentioned; nothing wrong with that, infact it's a necessity.