Money paid by the richer sort of prisoners in the Fleet and King's Bench, to the poorer, for their share of a room. When prisons are very full, which is too often the case, particularly on the eve of an insolvent act, two or three persons are obliged to sleep in a room. A prisoner who can pay for being alone, chuses two poor chums, who for a stipulated price, called chummage, give up their share of the room, and sleep on the stairs, or, as the term is, ruff it.