1 : to do something with less effort or energy than before I was exercising regularly last summer, but I've been slacking off recently. 2 : to become less active, forceful, etc. Their business has been slacking off in recent months.

Are you slack off?

To be or become lazy; to procrastinate or avoid work or one's duty. If you keep slacking off, we'll be forced to give you a formal warning.

Did not slack off?

if someone slacks off, they stop working hard or putting effort into something: Companies just want to make sure their employees aren't slacking off. He urged Washington not to slack off in its development of new energy sources. if the rate of activity, development, etc.