The literary term "surrealistic" is an adjective meaning "having characteristics similar to those found in the literary and artistic movement known as Surrealism". Surrealism was a literary and artistic movement founded in France by André Breton after World War I (in the 1920s). It was influenced by the psychological theories of Sigmund Freud, and attempted to directly express the subconscious rather than the conscious mind, eschewing the artifices of logic and formal literary conventions, and instead following the patterns of dreams and hallucinations. Some of the leading proponents of the school included Paul Eluard, Louis Aragon, and Robert Desnos.
a better answer! surrealism is, as you probably supposed, not too different from expressionism!