It became a catchphrase and you still hear it today; on the Brady Bunch, the other kids used to say that because of Marcia's habit of making everything all about herself.
I think it's kind of a harsh-sounding name, I get this impression of a hard-looking sixty-year-old woman with a Brooklyn accent (Mah-Sha) who smokes like a chimney and wears heavy eye makeup and terrible overprocessed, overdyed (probably dyed a dead shade of black) and scary-long fingernails.
Before you criticize a man, walk a mile in his shoes. That way, when you criticize him, you're a mile away and you have his shoes!
Steve Martin