Means nothing and makes anyone who says it look like a dumbass if repeated three times with a descending tone, awkward yet addicting.
Sean talked his friends leg off about stupid shit until his friend looked in his eyes and said, "Muh muh my, muh muh my, muh muh my...."
by Neetoll dickson March 11, 2005
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Muh muh my • muh-muh • muh luh muh • muh • Muh Dik • muh'fucker • muh titi kuh chul • Bad Muh fucka With Cheese • Deja Muh • dirty muh