His po-faced attitude when criticizing others was really annoying.

po-faced 是由 po（可能源自 poker face 中的"面无表情"）和 faced（面容、表情）组成的复合形容词，字面意思是"板着脸的"。 po-faced 在英语中形容人故意摆出一副严肃、道德高尚的表情，通常带有虚伪或自以为是的贬义色彩，类似于中文的"道貌岸然"。