バタンキュー LinksSentence search for バタンキューSentence search for ばたんきゅーSentence search for ばたんきゅうEdit in JMdict Noun, Adverb taking the 'to' particle1. falling asleep immediately; going out like a lightOnomatopoeic or mimetic word, Colloquial, See also バタンOther formsばたんきゅー、ばたんきゅう Discussions Log in to talk about this word.