QWhat is Da DA in english literature?

Look up "Dadaism" on Google. It is not English, but rather French, German and Belgian literature. It is not 19th but 20th century (the 1920s). The most famous dadaist poet was Tristan Tzara. Dadaism is not necessarily literature: there were also dadaist artists (most famous: Marcel Duchamp). It is a kind of deconstruction of art: art (or a literary text) is only such because somebody says it is. It led to surrealism.