mid-13c., "bird's bill," from Old French bec "beak," figuratively "mouth," also "tip or point of a nose, a lance, a ship, a shoe," from Latin beccus (source also of Italian becco, Spanish pico), said by Suetonius ("De vita Caesarum" 18) to be of Gaulish origin, perhaps from Gaulish beccus, possibly related to Celtic stem bacc- "hook." Or there may be a link in Old English becca "pickax, sharp end." Jocular sense of "human nose" is from 1854 (but also was used mid-15c. in the same sense).