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foul up

(intransitive, slang, idiomatic) To make a mistake, to go wrong.

faʊl ˈʌp109 viewsLast reviewed Jun 29, 2026+ Add a definition
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#1·Apr 27, 2026

(intransitive, slang, idiomatic) To make a mistake, to go wrong.

You really fouled up this time.
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#2·Apr 27, 2026

(transitive) To botch; to make a mess of.

I fouled up question 3 of the exam.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.

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