Someone who pretends to be married to avoid awkward social situations that arise from being in a long-term monogamous relationship without tying the knot.
I can't get my girlfriend's grandmother to quit telling us to get married. I've decided to just be a matriphony around her -- she's pretty senile anyway.
by tychobrahesmoose August 10, 2009
"My girlfriend's grandmother is still griping at us to get married, but we're happy just living together and being semispouses."
by tychobrahesmoose August 10, 2009