What is "microaggress"

alt. 1 (context intransitive English) To perform one or more acts of microaggression. 2 (context transitive possibly nonstandard English) To perform one or more acts of microaggression directed at (someone). vb. 1 (context intransitive English) To perform one or more acts of microaggression. 2 (context transitive possibly nonstandard English) To perform one or more acts of microaggression directed at (someone).