词源同chew.
A thousand men he [Samson] slow eek with his hond,In reference to the buttocks from c. 1600. Sense of "insolence" is from 1840, perhaps from a notion akin to that which led to jaw "insolent speech," mouth off, etc. To turn the other cheek is an allusion to Matt. v:39 and Luke vi:29.
And had no wepen but an asses cheek.
[Chaucer, "Monk's Tale"]