This comment nails it. I lived in Kensington and never heard it. In early adulthood, I lived with upper/middle-class whites from the outskirts of Philadelphia a

This comment nails it. I lived in Kensington and never heard it. In early adulthood, I lived with upper/middle-class whites from the outskirts of Philadelphia and heard it regularly. This is an affection adopted by those on the periphery to signal they are not on the periphery.