Top Definition
When a mother steals phrases or words from her child to sound cool and hip.
Kid:"That party was supercooltasticliciousness!"

Mom hears this and uses her skills of momgiarism the next day saying this to her friends:"I went grocery shopping and that sale was supercooltasticliciousness!"
by Rachal Davidson..and mom March 16, 2009
9 Words related to momgiarism

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