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1.
The attribute of a large vocabulary, To have an extensive knowledge of words and their definitions.
"I hate it when people Jargonify"
"Ya! Why can't they be more Vocabulous?"
by Dave Swartz October 08, 2005
 
2.
a person with an excellent command of the urban lexicon.
damn, that vocabulous lady rocks the slang
by kc March 18, 2004