- - It's common knowledge, Frank has a skeleton in the closet
- - Common knowledge
- - Pretence so false, common knowledge
- - so pretence is involved in what everyone knows unofficially
- - It's hush-hush in theory, but not in practice
- - Supposedly confidential but actually widely known matter
- - It's widely known duck enclosures on island last given precedence
- - A lot of people know it who probably shouldn't
- - Supposedly unknown but actually well-known fact
- - Ill-kept confidence
- - Nevada's Area 51, notably
- - It's thinly disguised
- - Everyone knows this writer's captivated by awful coterie I won't be part of
- - It's already out of the bag
- - Everyone knows it, but they shouldn't
- - *Officially restricted yet widely known information
- - A known unknown?
- - What everyone knows that they shouldn't know
- - Someting poorly hidden
- - It's out of the bag
- - Known or unknown?
- - What everybody knows.
- - Ill-kept hush-hush item.
- - Mystery in name only.
- - Something very generally known.
- - Everyone knows it begins with the dissolution of Crete
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- [ Other definitions ]