Dictionary

monkey wrench

noun

: a wrench that can be adjusted to grip or turn things of different sizes

Full Definition of MONKEY WRENCH

1
:  a wrench with one fixed and one adjustable jaw at right angles to a straight handle
2
:  something that disrupts <threw a monkey wrench into the peace negotiations>

Illustration of MONKEY WRENCH

First Known Use of MONKEY WRENCH

circa 1807

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