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1. One who is filthy, grimy, and fiends for an object(s); possesing a strong desire for drugs, money, any sort of vice or source of pleasure.

2. To be described as a fiend one must be both crust covered and fiendly beyond normal human levels of fiendliness or crustendom.
Child: Hey look at that guy over there; he is really strange.

Mom: Son watch out for crusty fiends like that; they can be dangerous.
by Phyllis Brownwood September 12, 2010
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