on good side

on somebody's good side

also on the good side of somebody
in a situation in which someone is pleased with you It's a good idea to get on your manager's good side when you start a new job.
Usage notes: the opposite meaning is expressed by on someone's bad side (in a situation in which someone is angry or annoyed with you): You don't want get on her bad side – she can be really mean to people she doesn't like.
See also: good, on, side