Ganache and Gardcorps Ganaches, also spelled garnaches, and gardcorps were overcoats worn by men of all social classes during the Middle Ages (c. 500 - c. 1500).

...they have been exchanging insults in writing: dickhead, dillweed, fuzzbutt, dorkwad, asswipe, and so forth.

a narrow escape

There's not much money - if that's what you mean. Approximately. Once all the debts are paid there will be very little. Nevertheless. Every little helps. The Brothers are sorely in need of it this weather.