Top Definition
Also non-hyphenated, maternoincestuant.

A person who engages in incestuous relations with his own mother. Sometimes referred to as a motherfucker.

The term may have use as in insult.
Tom's not very smart. If we call him a materno-incestuant, he probably wouldn't know what it means.
por dword 06 de Agosto de 2008
6 Words related to materno-incestuant

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