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A cook or a waitress, especially at a diner or cheap restaurant. ("Hash," in this sense, refers to a dish or stew of chopped meat and vegetables, not hashish.) Primarily heard in US. I worked as a hash slinger for several years to pay my way through college.
n. a cook, waiter, or waitress in a hash-house. I worked as a hash-slinger in an all-night diner.