A polite way of greeting a hearing impaired individual.\n> "Look, there comes old Mrs. Danielson. The poor thing just can't hear anything anymore. Hi-Def!"\n> "That filthy old man has been sitting on the street for so long that his darn ears have done rotted plumb off. Hi-Def!"\n> "Hey that's Pete Townsend over there, isn't it? Hi-Def!"\n

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