{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). See: GIVE THE SHIRT OFF ONE'S BACK.
OFF ONE'S BACK
Meaning of OFF ONE'S BACK in English
Slang English vocab. Английский сленговый словарь. 2012