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The act of approaching and restricting an unsuspecting friend and slowly driving your fist into the side of their rib cage, constantly increasing pressure and violently twisting your fist back and forth like a rig drill. Its very painful and uncomfortable.

While applying the torture treatment, it is common to shout out "Mega McMooch mule rig drill rib driver!"

It is also common practice to engage in the act of making a fist and twisting it just enough to let your victim see it happen a few times, minutes before its coming. This helps immensely to build anxiety in the target.

It is much like a noogey but applied to the side rib cage.
by WindowLicker9000 April 17, 2010
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