Top Definition
A form of government, in which a person (usually a mama's boy) is under the complete control of their mother. In most cases, a momarchy is usually a fascist dictatorship.
Leo: Mom, can I buy an XBox 360?

Leo's Mom: No! Go clean your room, you ungrateful piece of shit!

Leo: Jesus Christ, this is such a momarchy...
by Chuck Wood December 15, 2009
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