(Adj.) Used to describe a dubious or made up word, term, or phrase that does not makes logical
sense within existing language conventions but
may make sense in a cultural context.
Examples of incromulent words are
Meh: (interjection) Mediocre; lackluster; unexceptional; uninspiring.
Asshat: Obnoxious person.
A person, of either
gender, whose behavior displays such ignorance/obnoxiousness that you would like to make them wear their own ass as a
hat.
Origin: The antonym of the word cromulent