keep off back
keep off (one's) back
To refrain from bothering, scolding, or criticizing one (about something). I wish you would keep off my back. I'm not going to the interview, and that's final! Her parents kept off her back while she figured out what to do with her life after college.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
keep off (of) someone's backand keep off (of) someone's case
Inf. Fig. to leave someone alone; to stop criticizing or scolding someone. Keep off of my back! Leave me alone. Keep off my case!
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.