Most Onomotopoeia (words that indicate a sound by being similar in structure to the sound like "haha" or "meow") for laughing in human languages are some variation on "haha" or "hehe" or something similar perhaps transliterated with a j or a k.
I've done a fair bit of googling but I've found no answer as to what the Klingon version of this is if there even is one. While Worf might have us believe that Klingons do not laugh, his own examples and others, provide mountains of evidence to the contrary. If there is not an official construction, what would a likely construction be?