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1 definition by 1335Ninja

 
1.
Used to describe:
a) a idiot who feels they are significantly smarter than they are
b) a macfag
c) all the above

Can be used as a generic insult as well.
See that kid with his brand new macbook? Such an OMalley.

Person 1: Hey! I just got a 98% on that last test! Suckers!
Person 2: You're such an OMalley
by 1335Ninja July 25, 2010