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An expression of approval at an object or situation.
Waio! It's Megan playing basketball!
by Bob Sinclar of BBBC July 27, 2011
A knickname for the most awesomest girl in the world. She is always happy, social, and fun to be around. She is over 6 feet tall, superly pretty, and one of the fastest runners in her school. Her smile is very contagious, when you see it, you can't help but smile. She's fun to talk to, interesting and funny. She's one awesome chick.
waio is awesome
by karenlaughs August 18, 2007