nestle-cock
/ˈnɛslˌkɒk/Now chiefly English regional (northern, north midl. )
noun
The last-hatched bird of a brood; the weakling of a brood. In extended use: a mother's pet; a spoilt or delicate child or youth.
Origin
Mid 17th century; earliest use found in Thomas Middleton (d. 1627), playwright. From nestle + cock.