noun
a fictional character representing an overbearing or controlling mother, often used humorously
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The media portrayed her as a Mumzilla, constantly scrutinizing every detail of her children's lives.
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Watch out for Mumzilla when she gets stressed out about the party planning.
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I can't deal with Mumzilla today, she's being so overbearing.
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Her inner Mumzilla emerged when she felt threatened by someone else's parenting choices.