A fork of Rural Dictionary
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