Sigma Male

A sigma male is an introverted, “lone-wolf” analog to the alpha male in the proposed human dominance hierarchy. The alt-right author and former “game” blogger, Vox Day, developed the concept as part of his broader taxonomy of the male socio-sexual hierarchy.The sigma idea was his attempt at correcting what he viewed as a shortfall in the conventional PUA description of the type of man at the top of this proposed hierarchy.

https://incels.wiki/w/Sigma_male