The discription of a large male that Faps more than average.
My dad's a real Jackmo.
by Vert Dozer December 5, 2003
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A person who will waste your time while you're trying to sell them something, and has no money whatsoever. First used by Terry Jones in 1992.
That mother fucker is a johnny-jackmo. He'll never buy a new car.
by XxP0wd3rxX November 4, 2011
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