to throw a (monkey) wrench into the works
01
to slow down a plan or activity or prevent it from going on
Dialect
American
American![to [throw] a (monkey|) wrench (into|in) the works definition and meaning](https://cdn.langeek.co/photo/46477/original/?type=jpeg "to [throw] a (monkey|) wrench (into|in) the works definition and meaning")
idiom
informal
例
I hate it when someone throws a monkey wrench in the works.
to slow down a plan or activity or prevent it from going on
American
