Foul up
verb
To make a mistake, especially in a way that destroys a plan or causes confusion.
The order was fouled up because the delivery address was wrong.
Often appears as...
- foul up a plan
- foul up an order
Usage tips
Informal
Colloquial
verb
To interfere with the functioning or operation of.
The computer program was fouled up by the virus.
Often appears as...
- foul up a program
- foul up the system
verb
To make a mistake, especially in a way that destroys a plan or causes confusion.
The order was fouled up because the delivery address was wrong.
Often appears as...
- foul up a plan
- foul up an order
Usage tips
Informal
Colloquial
verb
To interfere with the functioning or operation of.
The computer program was fouled up by the virus.
Often appears as...
- foul up a program
- foul up the system
Definition 1 of 2
Pro Tip 1/3Casual Expression
Used in informal settings, not suited for formal writing or speeches.
I hope I don't foul up during my presentation tomorrow.
Pro Tip 2/3Plan Destruction
Emphasizes a mistake that ruins a well-laid plan.
The surprise party was fouled up when the guest of honor arrived early.
Pro Tip 3/3Confusion Cause
Highlights its use when an action creates disarray or misunderstanding.
Instructions were clear until Mark fouled up the explanation.
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