Top definition
What you call someone who spends way too much time on mmorpg sites, such as GaiaOnline, Neopets, and NeoDrama.net. Is usually a pale, pimply 28 year old man who lives in his mother's basement.
Person: Yo, it says you've been online for 20 hours straight! What a munsterpoo!

Person: Hey munsterpoo! How's your online persona going?
by richardnub January 14, 2011
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