put a spanner in the works(redirected from throw a spanner in the works)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
put/throw a spanner in the works(British & Australian) also put/throw a (monkey) wrench in the works (American)
to do something that prevents a plan or activity from succeeding We were hoping to get the project started in June but the funding was withdrawn so that rather threw a spanner in the works. The sudden withdrawal of the guest speaker really threw a monkey wrench in the works.