Synonyms of 'let something slide'
▷ See slide
neglectDictionary, forget, ignore
The company had let environmental standards slide.
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If you forget something or forget to do it, you fail to think about it or fail to remember to do it, for example because you are thinking about other things.
Don't forget that all dogs need a supply of water.
Such arguments ignore the important issues.
Thesaurus for let something slide from the Collins English Thesaurus
If you let something slide , you allow it to get into a worse state or condition by not attending to it.