Although debatable, the neologism can be interpreted as the tendency of some groupings which at first share a common idea to disintegrate, to separate into small groups by personal ambitions, difference of nuances in ideology or by trifles that prevent the formation of a block of weight in their field. It is clearly derogatory, and is formed by small groups ("small group, especially of people") the suffix -ism (in its double sense of "doctrine" and "attitude"). See isms.
GRUPUSCULISMO Current of thought tending to form small groups of people, with a specific purpose or with the desire to entertain themselves without actually doing anything else: . "The important thing is criticism not what is said in it. Care!!!! Refrain first of all from offering alternatives. It's about having a good time nothing more."