くすくす LinksSentence search for くすくすSentence search for クスクスEdit in JMdict Adverb (fukushi), Adverb taking the 'to' particle1. chuckle; giggleOnomatopoeic or mimetic word, See also くすくす笑う くすくすわらうOther formsクスクス Discussions Log in to talk about this word.