let something slide—
1. let smth. take its own course:
- If California was going to cost the Union so much, it would be better to let California slide.
2. neglect or ignore smth. such as one’s work, etc.:
- She let her lessons slide, preferring the company of her classmates in the residence.
3. (of an opportunity, etc.) allow to slip away without being profitably employed:
- Don’t let any chances slide past you, for your first may be your last.
let something slip—
1. = let something slide 2:
- He is too smart to let his work slip—rather, he has become a master at doing the minimal work needed to get by.
2. = let something slide 3:
- Every section of the community has an interest in the Initiative and as an area we mustn’t let the opportunity slip.
3. (also: let something slip out) say smth. without intending to:
- He carelessly let slip this information in conversation with a journalist.