deadpan
ˈdɛdpan
adjective
impassive or expressionless.
she delivered her monologue in a deadpan voice
blank,expressionless,unexpressive,inexpressive,impassive,inscrutable,poker-faced,straight-faced,dispassionate,unresponsive,stony,wooden,empty,vacant,glazed,fixed,lifeless
adverb
in a deadpan manner.
‘That’s all right then,’ Claire said, deadpan
verb
say something amusing while affecting a serious manner.
‘I’m an undercover dentist,’ he dead-panned