If you say that someone would be better off doing something, you are advising them to do it or expressing the opinion that it would benefit them to do it.
be browned off
to be angry , disgusted , etc.
be off your food
If you are off your food , you do not want to eat , usually because you are ill .
be way off beam
to be completely wrong or mistaken
to be off limits
If an area or a place is off limits , you are not allowed to go there.
be off one's head
If you say that someone is off their head , you mean that they have taken so many drugs that they do not know what they are doing.
to be off the radar
to no longer be noticed or important
be run off one's feet
to be very busy
be rushed off your feet
If you are rushed off your feet , you are extremely busy.
be knocked off one's perch
If someone is knocked off their perch , they are no longer admired or no longer thought of as important or clever .
be no skin off one's nose
to affect one not at all; be of no direct concern to one