Compression lock
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A compression lock(also known as a muscle slicer or muscle crusher) is a grappling hold which causes severe pain by pressing a muscle into a bone. A compression lock can cause a joint lock in a nearby joint when it is applied by squeezing a limb over a fulcrum.
References
Pearson, Charlie. Leg Slicer. www.lockflow.com. URL accessed January 7 2005.