According to the OED: "The name of a character in Ivan Goncharov's novel ‘Oblomov’ (1855), represented as inactive, weak-willed, and procrastinating: used allusively. Hence Oblomovism (ɒbˈləʊməʊvɪz(ə)m, ˈɒbləʊməvɪz(ə)m), conduct resembling that of Oblomov; sluggishness, inertia."
ex. gr., 1957 A. G. Meyer Leninism ix. 214 Oblomovism—"the behavior of Oblomov, pathetic hero of Goncharov's novel of the same name, who prefers to contemplate and discuss the universe, including his own predicament, instead of taking an active part in solving his problems and participating in life.