let it slide

(idiom) something in the past cannot be fixed, so it must be forgiven

Example Sentences:

Best Friend 1: Hey man.
Best Friend 2: Hi.
Best Friend 1: Look, I want to tell you something. Two years ago I went on a date with your wife.
Best Friend 2: I know, she told me.
Best Friend 1: I’m so sorry. I must apologize.
Best Friend 2: I’ll let it slide.
Best Friend 1: Why?
Best Friend 2: Because I went on a date with your wife!

My mother tried to apologize for being cruel to me when I was a teenager, but I told her I would let it slide.

Student: Sorry for being late teacher.
Teacher: What happened?
Student: My bus didn’t come.
Teacher: Okay, I’ll let it slide this time.

Media:

Similar idioms:

1. water under the bridge
2. forgive and forget
3. fill someone in
4. see through someone
5. work up to