Get off somebody’s back
Definition 1 of 1
Pro Tip 1/3Informal Use
The phrase is casual and might be inappropriate in formal situations like job interviews or official meetings. 
In a business meeting, don't say 'get off my back' to your boss; it's too informal.
Pro Tip 2/3Frustration Expression
Use it to express frustration or annoyance when someone is being overly persistent or controlling. 
After constant nagging, she exclaimed, 'Get off my back! I'll do it in my own time.'
Pro Tip 3/3Intensity Varies
The severity can vary; it might be a light-hearted request or a serious demand for personal space. 
He laughed and said, 'Alright, I'll get off your back,' realizing his friend was only teasing.