Black Man's Disease, namely, falling out asleep after a big (or not-so-big) meal. Of course, you don't have to be black to have it, but that's the community where I first heard the expression, and a lot of folks use it. Sometimes known as "The Itis" (pronouced eye-tiss).
My homie had B.M.D. on the way home from the restaurant, started snoring like a foghorn in the car.
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