丈二和尚，摸不着头脑 (丈二和尚，摸不著頭腦) zhàng èr héshang, mōbùzháo tóunǎo

zhàng èr héshang, mōbùzháo tóunǎo phrase like a three-meter high monk, you can't rub his head; at a total loss
Domain: Proverb 谚语
Notes: (CC-CEDICT '丈二和尚，摸不著頭腦')