dead·pan /ˈdɛdˌpæn/
無表情的臉(a.)無表情的臉(ad.)無表情的(v.)無表情地說
deadpan
adj : deliberately impassive in manner; "deadpan humor"; "his face
remained expressionless as the verdict was read" [syn:
expressionless, impassive, poker-faced, unexpressive]
adv : without betraying any feeling; "she told the joke deadpan"