Noun
alt-center (uncountable)
(slang, politics, derogatory) Abbreviated form of alternative center, modeled on alt-right, alt-left; a set of centrist ideologies, especially ones which delegitimise political dissent and/or depend on (e.g. racial) conspiracy theories, whose presence is mainly confined to the Internet.
Coordinate terms: alt-left, alt-right, alt-light, radical centrism