on one's back

on one's back  {adj. phr.},  {informal}

Making insistent demands of you; being an annoyance or bother.

My wife has been on my back for weeks to fix the front door screen.

I can't get any work done with the children on my back from morning until night.

Jim could do a better job if his boss weren't on his back so often.

Contrast: OFF ONE'S BACK.