1 definition by Kunisaki Yukito

traditionally a Japanese onomatopoeia used as a growl like for lions, tigers, bears, dinosaurs.

Used in the H-Game/Anime series Air by the main female character as an expression of discontent, like when shot down on an idea, or hurting herself.

see also: 'uguu'
Misuzu: *trips falls flat on face*
Misuzu: "G..Gao...."
by Kunisaki Yukito February 11, 2005
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