throw a monkey wrench into

Idioms  

1. Sabotage or frustrate a project or plans, as in The boss threw a monkey wrench into our plans when he said we'd have to work Saturday. This transfer of industrial sabotage—that is, throwing a tool inside machinery—to other subjects dates from the early 1900s.

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Example Sentences

“The last thing that a booming economy needs is to throw a monkey wrench into a system that we have that is working marvelously well.”

From Seattle Times • Jul. 12, 2023

It’s why the American Medical Assn. has tried to throw a monkey wrench into a last-minute bipartisan agreement that could result in the enactment of a ban before the end of this year.

From Los Angeles Times • Dec. 16, 2020

A rise in the dollar from its current 85 on the DXY to 120 over the next six or seven years will throw a monkey wrench into the plans of the Federal Reserve.

From Forbes • Oct. 14, 2014

I also don’t want to give this person the power to throw a monkey wrench into a day that is supposed to be about me and my fiancé.

From Salon • Jan. 11, 2013

The findings throw a monkey wrench into the idea that perhaps older sperm or eggs have more mutations that could increase the odds of having a child develop autism.

From Reuters • Feb. 2, 2012

Related Words

• cripple
• destroy
• disrupt
• hamper
• hinder
• obstruct
• subvert
• torpedo
• undermine
• vandalize
• wreck