Most Canadian native speakers, including almost all CBC radio announcers say "谬脸". [( C! |) g6 C' d * x$ Q$ m, m0 D( ?5 X& JSome VOA announcers say "咪脸". Chandler in sitcom "Friends" says "谬脸".' t/ f0 V6 {8 ]
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I say "谬脸".