back off

动词 back off:

1. move backwards from a certain position
   同义词：back up, back down
2. remove oneself from an obligation
   同义词：chicken out, pull out, back down, bow out

1. John was ready for a fight but he backed off at the last minute.
   约翰要准备打一仗的，但到最后的时候却退缩了。
2. I don't like that car sitting on my tail. Wave him to back off.
   我不喜欢那辆车紧靠在我的车尾，挥手示意他倒车(离远些)。