on 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
Persistently nagging or urging someone to do something.
See also: back, on
American Heritage® Dictionary of the English Language, Fifth Edition.
- 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