I don't see much Singlish (Singapore English) here so I thought I'd share this! We have a whole lot of words from several langauges and dialects that I find hard to express in English. Kiasu is a Hokkien romanisation of "驚輸" (jīngshū). It has negative connotations associated with it, means afraid of not getting the best thing or losing out. Kiasu behaviour would be like someone queueing very early and for a long time to get something (concert, a sale, food etc.), or a driver speeding up and not letting you out into his lane.