on (one's) back

on (one's) back

Constantly nagging one about something. Ugh, my mom is on my back all the time about my grades, but I just have no interest in the classes I'm taking this semester.See also: back, on

on someone's back

Also, on someone's case. See under off someone's back. See also: back, on

on someone's back

If someone is on your back, they are criticizing you a lot or trying to persuade you to do something. The crowd aren't forgiving — as soon as you make a mistake they're on your back. If they find out you're weak, they're on your back straight away. Compare with get off someone's back.See also: back, on

on your back

in bed recovering from an injury or illness.See also: back, on

on (someone's) back

Persistently nagging or urging someone to do something.See also: back, on