Top Definition
The great stuff. The ultimate. The hero. The weed that will knock you out. The knock-out punch. The finishing move. The greatest comeback.
"Damn...that's the jibberknacker, man!!"

When a guy always gets the girl, people say, "He's the jibberknacker, man!"

After a large explosion, "Damn what a jibbernacker!"

People shouting during a boxing match "Give him the Jibberknacker!!"
by Anendra February 04, 2013
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