A - Z Database

A - Z Database

Clean/clear as a whistle

The expression clean or clear as a whistle dates from the 18th century and refers to the clean, pure sound a whistle should make, especially if it is...

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Clean bill of health

This is a general attestation of fitness or qualification and derives from the certificate that ships had to carry from the 17th century, before putti...

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Clean pair of heels

To show a clean pair of heels is to set off quickly and leave one’s pursuers with nothing but a view of one’s heels. The expression dates from the 16t...

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Clean sheet

see Keep a clean sheet


Clean slate

A clean slate, as in having ‘wiped the slate clean’, is a metaphor for a fresh, new beginning. There are two equally valid contenders for the origin....

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Clean sweep

see Make a clean sweep


Cleaned out

Slang expression from the early 19th century for being left with no money especially after gambling.


Cleanliness is next to godliness

This expression is attributed to John Wesley (1703-1791) in Sermon 93. “Cleanliness is, indeed, next to godliness.” There is evidence to suggest, howe...

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Clear/sound as a bell

For centuries, one of the clearest sounds was that of church bells, which could be heard from miles away. Thus, clear as a bell means perfectly clear...

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Clear as crystal

see Crystal clear


Clear as day

As clear as day means very easy to understand or see and dates from at least the 14th century. See also Plain as day.


Clear as mud

The antonym of ‘clear as day’, a jocular way of expressing that something is not very clear at all, dates from the early 19th century.


Clear as the nose on one’s face

see Plain as the nose on one’s face.


Clear-cut

The word ‘cut’ is used here as an intensifier to stress that something is indeed very clear, in the sense that it has distinct and distinguishing outl...

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Clear off

Colloquial expression meaning to depart or go away, usually in the form of an imperative; dates from the early 19th century.