2 definition by luckynacho

Top Definition
A person, often when referring to gamers or any other target, that isn't really into it and only does this activity on an infrequent basis while being terrible at it. Can be described as weak sauce or non mlgpro.
Zac: "dude, I hate all those people who play farmville on facebook, they probably haven't ever picked up a controller in their lives"
Mike: "yea, they're a bunch of casuals"
by luckynacho February 24, 2010

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Abbreviation for overused. Commonly used in Pokemon communities regarding tiers, but is also used elsewhere for other reasons.
Kid1: Tyranitar is so OU!!11!!
Kid2: Shut the fuck up.
by luckynacho January 22, 2011

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