The phrase "threw a monkey wrench in to" is an idiomatic expression that means to disrupt or hinder the progress or completion of something, usually by introducing an unexpected or complicated obstacle. This idiomatic phrase is primarily used in American English.
Derived from the world of mechanics, particularly referring to working with machinery, the term "monkey wrench" alludes to a type of adjustable spanner or wrench widely employed in the United States. By "throwing" this tool into a situation, the phrase metaphorically implies the act of intentionally causing a sudden and significant disruption or obstacle, comparable to jamming or obstructing the smooth functioning of a machine.
This colloquial expression is often used to describe how an unforeseen event, complication, or difficulty can cause disturbance or chaos, leading to the failure of a plan, project, or endeavor. It emphasizes the element of surprise, unpredictability, and the overwhelming consequences of the obstacle encountered. It implies a disruption that can require substantial effort or time to overcome or resolve.
For instance, if someone says, "His unexpected absence threw a monkey wrench into our carefully planned event," they mean that an abrupt change or unforeseen circumstance (his absence) created significant disruption or hindrance, disrupting the event's smooth progress or success. Overall, "throwing a monkey wrench in to" signifies the occurrence of an unexpected and problematic obstruction or interference with a previously established plan, often leading to requiring alterations, rearrangements, or even abandonment.
