on someone'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
Farlex Dictionary of Idioms.
on someone's back
Also, on someone's case. See under off someone's back.
See also: back, on
The American Heritage® Dictionary of Idioms by Christine Ammer.
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
Collins COBUILD Idioms Dictionary, 3rd ed.
- be on (one's) back
- be on somebody's back
- be on someone's back
- back at it
- back at it (again)
- back onto
- back onto (something)
- a fire extinguisher
- (a body part) is killing (one)
- a whole thing