Top Definition
Noun: 1. A person who uses UD posts for personal vengence, not realizing it makes them look pitiful. 2. A person who posts their own name on UD, not realizing it makes them look like someone you want to avoid at all costs.
That UDumber put the name of the girl who dumped him on. Has he lost his mind?
by magill March 22, 2008
5 Words related to UDumber

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