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Wrote accidentally when texting the word 'okay', when a person is rushing to write a reply, and thinks they have predictive text on but in fact they do not, 'mjaw' is the result of writing the word 'okay'.
Pronounced: muh-juh-ow

*In a text conversation*

Jeff: "How are you?"
John: "mjaw"
Mavis: "Do you want to meet up tomorrow?"
Jack: "Mjaw"
by Ovie95 August 06, 2011
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