Extra dishes accrued when they have been sitting in the sink for longer than the pre-determined acceptable length by individuals of the same household.

The customary rate of dish interest is one piece of cutlery or small dish per day added to the heap of dishes belonging to the owner.

Dish interest is an attempt to dissuade individuals from leaving their dishes in the sink unwashed for too long. It should be noted that this policy often backfires and results in an insurmountable amount of dishes.
Joe: He's been lagging on dishes for a week now. It's time my roommate starts accruing some dish interest.

Bob: Dude! just buy a dishwasher!
by DocOnDuty February 4, 2010
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