"Papa is a preferable mode of address," observed Mrs General. "Father is rather vulgar, my dear. The word Papa, besides, gives a pretty form to the lips. Papa, potatoes, poultry, prunes, and prism are all very good words for the lips: especially prunes and prism. You will find it serviceable, in the formation of a demeanour, if you sometimes say to yourself in company — on entering a room, for instance — Papa, potatoes, poultry, prunes and prism, prunes and prism.

Bk. II, Ch. 5 - Little Dorrit (1855-1857)