Deadpan comedy

Deadpan or dry humor/wit describes the act of deliberately displaying a lack of or no emotion, commonly as a form of comedic delivery to contrast with the ridiculousness of the subject matter. The delivery is meant to be blunt, sarcastic, laconic, or apparently unintentional.

The term deadpan first emerged as an adjective or adverb in the 1920s, as a compound word combining "dead" and "pan" (a slang term for the face). The oldest usage recorded by the Oxford English Dictionary comes from The New York Times (1928), which defines the term as "playing a role with expressionless face". An example of this usage is in a scene from the 1934 film The Gay Bride in which a gangster tells a man on the other end of a phone conversation to "give it a dead pan" (with the emphasis on "pan"), so that the man does not inadvertently alert anyone else in the room as to the importance of what the gangster is about to say. The usage of deadpan as a verb ("to speak, act, or utter in a deadpan manner; to maintain a dead pan") is recorded at least as far back as 1942.

Early in his vaudeville days, Buster Keaton developed his deadpan expression. Keaton realized that audiences responded better to his stony expression than when he smiled, and he carried this style into his silent film career.

Many popular American sitcoms use deadpan expressions to deliver dry humor, including Curb Your Enthusiasm, Arrested Development, and My Name Is Earl. More recent examples are Andre Braugher as Captain Raymond Holt from the TV show Brooklyn Nine-Nine, Jennette McCurdy as Sam Puckett in iCarly, and Louis C.K. in Louie. Another example is the often-philosophical comedy of Steven Wright.

...
Wikipedia