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1.
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 08, 2003
270 50
 
2.
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
31 74
 
3.
(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 21, 2004
32 78
 
4.
Noun - A really big penis.
"Damn, have you seen his johnson rod!?!"
by wiredagain July 25, 2003
28 91