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1.
South African slang interjection indicating disbelief, moral disgust, surprise. As in 'I don't believe what I am seeing.'

The stress falls on the first syllable, the /yi/ is a diphthong and the /o/ is pronounced as in "order"
Julius Malema and Helen Zille are at each others' throats yet again? Hayibo!
by Polly Glot December 07, 2010