ばかあな 馬鹿穴 LinksSentence search for 馬鹿穴Sentence search for ばかあなKanji details for 馬, 鹿 and 穴Edit in JMdict Noun1. clearance hole (hole for a bolt, screw, etc., which is large enough to allow the thread, etc. to pass through) Discussions Log in to talk about this word.