po-faced
adjective/ˌpəʊ ˈfeɪst/
/ˌpəʊ ˈfeɪst/
(British English, informal, disapproving)- looking very serious and as though you do not approve of somebody/something
一本正经的；不以为然的；孤傲的；板着脸的 Word Origin1930s: perhaps from po ‘chamber pot’, influenced by poker-faced.