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a fight between two mom's usually as the result of an argument between their respective sons.
John: "My mom said that your mom looks like a tramp in her sunday dress"

Steve: "Pfft, I'm gonna tell her and then she'll be sorry"

..some time later

John: "I can't believe my mom cried and ran away, how embarassing".

Steve: "I know, it was an awesome mom fight"
by momfighter December 15, 2011