American Idioms – Idiom Wizard Lists Over 5,500 Idioms & Slang Descriptions

Throw a wrench into the machinery


Create chaos. Ruin a plan. (Compare to Monkey wrench, LouseĀ  up, Torpedo,Throw a curve ball or a Fly in the Ointment).

“He threw a wrench into our plans to drink beer when he brought his baby boy.”

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