Something which becomes muddled or botched in some way.(noun)
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Use "balls-up" in a sentence
"The $3.1 million project suffered a cost blowout of $615,000, which veteran Labor Senator John Faulkner described as a "balls-up"."
"Ireland will be given an official apology by the International Rugby Board this week, for the balls-up that cost their team their customary victory in Cardiff."
"I would like to think that it is a spell-check balls-up, but the mind still boggles."