monkey wrench


Concise Oxford English Dictionary © 2008 Oxford University Press:
monkey wrench
noun an adjustable spanner with large jaws which has its adjusting screw located in the jaw that is fixed. verb (monkey-wrench) informal sabotage, especially as a form of protest.
– phrases
a monkey wrench in the works North American term for a spanner in the works (see spanner).
– derivatives
monkey-wrencher noun.
'monkey wrench' also found in these Oxford entries:

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