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A sarcophagus. Like a Chicago overcoat, but Ancient Egyptian. The most famous Cairo Overcoat is used by the Homestuck character Lord English; it is made of the fabric of spacetime and can transform from a sarcophagus into a real coat and back.
Stitch mutters to himself in his shop. He guesses Eggs and Biscuits are roughhousing again, because the fabric of spacetime is tearing something fierce on Lord English's CAIRO OVERCOAT. This sort of thing is exactly why he keeps a BACKUP COAT, and always leaves Stitch with one of them.

--Homestuck, Intermission 1
by DialM June 19, 2016
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