KieukKieuk is a consonant of the Korean Hangul alphabet. It is pronounced aspirated, as at the beginning of a syllable and as at the end of a syllable. For example: 코 ko is pronounced, while 부엌 bueok is pronounced .Slang usageIn South Korean internet slang, the use of indicates laughter. Similarly, is a lighter laugh than. Either or can be repeated a number of times to this effect.