Slang interjection indicating disbelief, moral disgust, surprise. As in 'I don't believe what I am seeing.' or 'Wow'. It is also used in isiZulu and literally translates as "Oh no". In pronunciation, the emphasis 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!