we'll start with the true definition of the word anarchist so that you can understand more clearly:
1. a person who advocates or believes in anarchy or anarchism.
a person who seeks to overturn by violence all constituted forms and institutions of society and government, with no purpose of establishing any other system of order in the place of that destroyed.
a person who promotes disorder or excites revolt against any established rule, law, or custom.
an anarchist poser is one who thinks that wearing a wrist band with the anarchy symbol on it makes them an anarchist when they truly know nothing about anarchy. why? no clue. other examples of anarchist posers are people who think that anarchy is simply a style. basically, anyone who claims to be an anarchist but does not completely believe that the complete lack of government would be the best thing for us is an anarchist poser otherwise known as a "wannabe anarchist". also, someone who thinks they're anarchistic but doesn't truly devote themselves to the cause can be an anarchist poser, or someone who only claims to be anarchist to fit into a clique, like the "punk" clique.
real anarchist: do you even know what anarchy is?
anarchist poser: yeah, it's a brand, right?
real anarchist: ...