be on someone's back

be on (one's) back

To be 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. My boss has been on my back all week to get that report done. I'm sorry for being on your back about it, but I need an answer soon.

See also: back, on

Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.

be on (or get off) someone's back

nag (or stop nagging) someone. informal

See also: back, on

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