Centrist Marxism represents a position between revolution and reformism.
For instance, the Independent Social Democratic Party of Germany (USPD) and the British Independent Labour Party (ILP) were both seen as centrist because they oscillated between advocating reaching a socialist economy through reforms and advocating a socialist revolution.
For Trotskyists and other revolutionary Marxists, centrist in this sense has a pejorative association.
They often describe centrism in this sense as opportunistic since it argues for a revolution at some point in the future, but urges reformist practices in the meantime.
For example, the Communist League described the ILP as a centrist organisation and therefore "politically shapeless and lacking any clear political position on the problems confronting the revolutionary movement";[1] British Trotskyist leader Ted Grant called the ILP "typical confused centrists";[2] and the Socialist Workers Party's journal described the ILP as "a centrist organisation whose revolutionary rhetoric was at odds with its reformist practice".