Biddy

An old woman, especially one regarded as fussy or gossipy; originally a familiar term for a hen or chicken.

Originally from 'biddy-biddy,' an imitative call used to summon chickens, similar to 'here chick-chick.' The term transferred from chickens to women by the 18th century, initially as a generic name for a servant girl, then evolving into a somewhat derogatory term for an older woman.