Top definition
An adjective describing someone who is being difficult, annoying, childish or silly. Also used to disagree with someone's idea or statement.
Katherine: I want a puppy for the apartment!
Paul: Stop being a poopie-face magoo, a puppy is a lot of work.

OR

Katherine: We should name our puppy D.O.G.
Paul: Right... Poopie-face magoo.
by KAZEMOTO October 22, 2009
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