deadpanEnglishOxford English Thesaurusdeadpan adjective he cracked jokes with a deadpan expression on his face: blank, expressionless, unexpressive, inexpressive, impassive, inscrutable, poker-faced, straight-faced, dispassionate, unresponsive, stony, wooden, empty, vacant, glazed, fixed, lifeless. ▷antonyms expressive; comical.deadpan Oxford Dictionary of English