When someone or something looks Crusty/as in bad or like they got runned over by a car . They look like a mess , Dusty as in Dirty or like they look bad.
A “Crusty Dusty Midget” Is a small smelly and shittey human that will come in your house and take the crust of your PB&J and take a number 2 on your bathroom that will leave it dusty.
That packet of extra spearmint gum that you forget you have in your backpack for school so as a result it becomes very crusty due to the lack of attention it receives from the consumer.