Top definition
Ugnnaaa means extreme frustration and boredom. Depending on the level of a's you use towards the end of the word, shows the level of boredom.

It is derived from 'Ugh' and 'Noo', put together and pronounced 'Uh-Na'
'Ugnnaaa I HATE this Maths Class!'
by Riu December 08, 2009
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