Seinfeld slang for a fake mechanical part used to jack up the price on your ignorant azz.
Mechanic: "You're gonna need a Johnson rod."

El Stupido: "Oh, a Johnson rod. Well ya better put one of those on there."
by Erix December 8, 2003
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(n.) A rod used to control the timing of, and how long the valves stay open on a steam locomotive.
The setting of the johnson rod determines how much power goes into each piston stroke, and to which direction the locomotive will move.
by waltermitty August 22, 2004
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device that is connected to a gazach via a knibbling pin
the johnson rod fell from the gazach because the knibbing pin fell out.
by Don Alonso May 28, 2003
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