every man  has a fool in his sleeve
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<abbr style="text-decoration: underline;" title="has / hath" > has</abbr>
hæz
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fool
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Definition & Meaning of "every man has a fool in his sleeve"in English

every man has a fool in his sleeve
01

used to imply that regardless of how intelligent or wise a person may appear, everyone is capable of making mistakes or acting in a foolish manner at times 

Proverb

What is the origin of the proverb "every man has a fool in his sleeve" and when to use it?

The origin of the proverb "every man has a fool in his sleeve" is not clearly tied to a specific text or culture but is rooted in common European wisdom. This proverb serves as a reminder that everyone has their weaknesses and that no one is entirely free from making mistakes. It encourages humility, as it acknowledges that even the most composed individuals have their vulnerabilities.

Examples
Even the most successful businessmen have made foolish decisions at some point in their careers, proving that every man has a fool in his sleeve. 
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