Top Definition
When someone is in just a really grumpy mood either from going to bed too late and getting up to early or being rudely awoken after a night of drinking.
1. "Our son was in such an ugaboo mood this morning when we woke him up for volleyball practice.

2.Chris was in such an ugaboo after his friends decided to push him into the pool after the party.
by tehdomo August 27, 2008
5 Words related to Ugaboo

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