a word used to describe somebody who pisses you off, is extremely annoying, snores while they sleep, ect. in general its a word that you use to call somebody if they do something you don't like
Joey: Do u know who used this pot for mac and cheese last? Its dirty.
Matt: Yea I think it was Tom. What a rat.
Matt: Yea I think it was Tom. What a rat.
by mattfofatt01 January 6, 2008
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Get the Rat mug."Wow I can't believe Kimberly is friends with those rats! They don't even know the definition of friendship or how to treat friends like they deserve."
by jiminyougotnojams January 1, 2017
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