馬鹿穴
ばかあな
clearance hole (hole for a bolt, screw, etc., which is large enough to allow the thread, etc. to pass through)
穴馬 is read as あなうま (anauma) and means dark horse (candidate).
あなうま
anauma
ばかあな
clearance hole (hole for a bolt, screw, etc., which is large enough to allow the thread, etc. to pass through)