Answer: urbanlegend

AnswerCrossword Clue
URBANLEGENDTarget of TV's "MythBusters"
URBANLEGENDBit of modern folklore
URBANLEGEND"MythBusters" subject, often
URBANLEGENDCity dweller's Acura?
URBANLEGENDOften-repeated bit of modern folklore
URBANLEGENDSingers Keith and John?