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Describing the feeling of being pouty or upset. Stems from the sound one makes when pouting one's lips.
Can be used as an adjective or verb.
I failed my test today; it makes me so duu.

Duu! I can't watch the movie with you guys tonight!
by chenxjen July 27, 2010
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The DUU is a group of three or more girls who are only mates because their boyfriends are mates. They're usually quite wet girls and they are embarrassed to expose the real meaning of the acronym. (Dicks Upset Us). This group, is therefore only for homosexuals.
I'm in the DUU because I'm wet
by garnettknows May 09, 2017
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