dadaism

Dadaism is the artistic and literary movement that emerged during World War I, characterized by deliberate irrationality, absurdity, and rejection of conventional aesthetics.

The movement embraced chance, nonsense, and anti-art as protests against bourgeois culture and the rationalism blamed for the war's horrors: Her collages have a dadaism quality—random newspaper clippings glued over fashion ads. (Capitalized Dadaism is the more common form.)