SMOG (Russian: СМОГ) was one of the earliest informal literary groups independent of the Soviet state in the post-Stalin Soviet Union. Among the several interpretations of the acronym are Smelsot', Mysl', Obraz i Glubina (Courage, Thought, Image and Depth), and, humorously, Samoe Molodoe Obshchestvo Geniev (Society of Youngest Geniuses). The group carried out public reading of poetry and issued several samizdat collections and a magazine Sfinksy ("Sphynxes"). In 1965, they revived the literary meetings at Mayakovsky Square (Mayakovsky Square poetry readings).