off one's back
off one's back {adj. phr.}
1. {informal}
Stopped from bothering one; removed as an annoyance or pest.
"Having a kid brother always following me is a nuisance," Mary told her mother. "Can't you get him off my back?"
The singer was so popular with teenagers that he took a secret vacation, to keep them off his back.
Contrast: ON ONE'S BACK (2).
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Source: A Dictionary of American Idioms