dissident right

Etymology
It is not known who has coined the term, but it refers to a collection of right wing groups that do not fit into mainstream right wing categories. This can include White nationalism, Nationalism, National Socialism, Fascism, Neo-Absolutism and other ideas.

Noun

 * 1)  Far-right political groups who oppose mainstream conservatism, promoting more radical beliefs such as opposition to LGBT rights and non-White identity politics, anti-Semitism, white nationalism and white supremacy, and traditionalist nationalism.

Related terms

 * alt-right
 * neo-reactionary