manger n.

late 14c., "jaw, jawbone," from Late Latin mandibula "jaw," from Latin mandere "to chew," which is perhaps from PIE root *mendh- "to chew" (source also of Greek mastax "the mouth, that with which one chews; morsel, that which is chewed," masasthai "to chew," mastikhan "to gnash the teeth"). But de Vaan suggests a semantic development from a PIE root meaning "to stir, whirl," source also of Sanskrit manthanti "to whirl round, rub," Lithuanian mesti "to mix," Old Church Slavonic mesti, Russian mjasti "to trouble, disturb." Of insect mouth parts from 1826.

"jelly-like preparation in cookery," late 14c., from Old French blancmengier (13c.), literally "white eating," originally a dish of fowl minced with cream, rice, almonds, sugar, eggs, etc.; from blanc "white" (also used in Old French of white foods, such as eggs, cream, also white meats such as veal and chicken; see blank (adj.)) + mangier "to eat" (see manger). Attempts were made nativize it (Chaucer has blankemangere); French pronunciation is evident in 18c. variant blomange, and "the present spelling is a half attempt at restoring the French" [OED].