KUKUKU
an abbreviation of the phrase 'cool cool cool', typically screamed or shouted in the span of less than a second, in order to express one's distaste towards an extra comment or uninteresting story without too obviously displaying one's lack of vocabulary due to the confusion created when said
Ryan: "I got full marks for the test, and I didn't even stud-"
Gareth: "KUKUKU"
Gareth: "KUKUKU"