let something slide
let (something or someone) slide
To choose not to take any action to correct or improve a particular situation or someone's actions or behavior. I find it so frustrating that my wife is always willing to let the kids slide when they misbehave, meaning I have to be the bad guy and enforce the rules. I've been meaning to paint the shed all summer, but I keep letting it slide.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
let something slidenegligently allow something to deteriorate.
Farlex Partner Idioms Dictionary © Farlex 2017