There are many english expressions using the word “off”. “Off the cuff” means doing something without a plan.
If you do something “on and off” it means you do something for some time, then stop, then resume it. Lots of people go to the gym “on and off”.
If you’re “better off” it means you’re in a better situation, personally or financially.
“Off duty” means you’re not working right now.
“Off the wall” means bizarre or strange.
If you “drift off” it means you stop paying attention to someone, or fall asleep, or both.
Excuse me while I drift off. My assistant will do the next lesson.