One who rejects mainstream conservatism in United States politics in favor of extremist ideologies - among which may include an opposition to multiculturalism, anti-immigration, white nationalism and supremacy, anti-Semitism, anti-egalitarianism, nativism, racial/ethnic identity politics, and fascism. Often, alt-rightists view mainstream establishment conservatives as weak and untrue, and reject compromise with
liberal factions. You're most likely to encounter an alt-rightist on
internet blogs and
4chan, where the movement is made up mostly of socially-awkward virgin teenagers.