foie-gras n.

1706, "small pie or pastry," from French pâté, from Old French paste, earlier pastée, from paste (see paste (n.)). Especially pâté de foie gras (1827), which was originally a pie or pastry filled with fatted goose liver; the word now generally is used of the filling itself.

"oily fat of land animals," c. 1300, from Anglo-French grece, Old French gresse, craisse "grease, fat" (Modern French graisse), from Vulgar Latin *crassia "(melted) animal fat, grease," from Latin crassus "thick, solid, fat" (source also of Spanish grasa, Italian grassa), which is of unknown origin. Grease paint, used by actors, attested from 1880. Grease monkey "mechanic" is from 1918.