Idiom idiom
foul up
Meaning
To make a mistake, to go wrong.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
Examples
“I hope I do not foul up this simple task.”
“The team worked hard on the project, but they managed to foul up the final report by missing the deadline.”
“Despite his extensive preparation and years of experience, the diplomat feared he might foul up the delicate negotiations during the high-stakes summit.”
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Last updated August 10, 2026