Slip through the cracks
Meaning
Be overlooked or forgotten.
Usage
Used when errors occur unintentionally.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Falling into cracks between boards.
Used in administrative contexts since the 20th century.