Top Definition
Someone with an over larged head ( Meat Head)
You jave got a Jonjo
by RuG-MuNCHeR(TM) November 09, 2005
awesome guy that everybody loves he has to be the coolest guy your ever meet. He is also known for his huge dick of at least 15".
girl 1 "wow did you see Jon-jo dick"
girl 2 " it had to be a least 15 inches"
by becky king December 19, 2011

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