go easy on (someone or something)
1. To be lenient with someone, especially after they've done something that could justify a punishment or scolding. Go easy on your little brother, will you? He didn't mean to break the window. I only lost by six points, but I think he was going easy on me since he's so much better.
2. To use only a small amount of something. Hey, go easy on the ketchup—there's not much left.
go easy on someone
If you tell someone to go easy on another person, you are telling them not to punish or treat that person severely. Note: In the first idiom below, ABC is pronounced `a b c', as if you are spelling it out. Go easy on her, Michael. She's having a hard time as it is.
go (or be) easy on someone
be less harsh on or critical of someone. informal