🐒 Monkey
"Throw a monkey wrench in the works"
Meaning
To cause a problem that stops a plan.
About the monkey
Monkeys are agile, mischievous, and quick to imitate, which shows up in idioms about playful trouble and copying others.
Example sentence
The sudden rain threw a monkey wrench in our picnic plans.
Test yourself
Which idiom means...
To cause a problem that stops a plan.