Stands for Rejectable Urban Dictionary Definition. There are many types, of them two stand out to be the most common. One is generated by users aiming to flame random victims through their vicious definitions of them, the other is generated by lovesick interweb users attempting to define their lover's name, usually containing words and phrases like "best ever", "can't live without", and "soulmates", etc.
I'm just started editing for UrbanDictionary.com but all these RUDDs are getting ridciulous.
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