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1. A stupid or ignorant person, a person of low intelligence or a douchebag

2.An expression of exasperation when someone does something stupid
1. Will: "The guy in the bakery just gave me sprinkles instead of chocolate chips"
John: "What a haboi!"

2.Navid: "I just cut my own hand off!"
Ryan: "HABOI!"
by Rather Large Walrus July 25, 2010
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