Top definition
a silly, stupid person. can be used when stating a fact, or as an insult.
came from the phrases 'you are a moo' and 'you are stupid'.
'you forgot your toothbrush and we're goin on holiday for 3 weeks? you moopid. don't worry, we'll get another'
'well at least im not a MOOPID LIKE YOU!!!!!'
by chickenpops March 08, 2005
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