Trading Quids

A secret "handshake" used by several shadowy societies in Britain concerned with the reestablishment of the Empire, especially in North America.

Person 1: Sir, would you like to exchange quids with me?
Person 2: I do not understand to what you are referring.
Person 1: Ah, my mistake.
Person 3: Excuse me, I could not help but overhear your proffer of trading quids with that fellow. I would be happy to trade quids with you.
Person 1: Ah well in that case, kind sir, please take this quid and also this secret parcel as a gesture of my good will.