Afraid of "losing out" to other people.
These parents are so kiasu! School hasn't started yet for their Primary One children and they're already buying tons of assessment books.
by Dissipate April 04, 2004
Originates from Singapore, Chinese Hokkien dialect. Means 'afraid to lose out', 'competitive to the point of doing anything just to win', 'cannot bear to lose'.
John is 'kia su' that he will not pass his trial exams.
by Michow November 29, 2004