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any single-dish frozen microwaveable meal, especially if it is portion controlled or calorie-reduced. Multiple dishes on a single tray, like a TV dinner, are not included.

The term comes from the rhyming names used by a couple of brands of calorie-reduced frozen dinners: "Lean Cuisine" and "Light Delight".
I nuked a rhyming dinner.
by Chief Blather November 09, 2010
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