1) a person who is ignorant of large
words
2) a person who pretends to
know a word, then secretly refers to a
dictionary
Tom: Harry, you are such a macroverbumsciolist.
Harry: No I'm not! You're a macroverdumbscientist.
Harry later looks up macroverbumsciolist on
urbandictionary.com and hates Tom for the next five minutes. He then pays up on his
bet.