What is the meaning of Biddy?

A woman, especially an old woman; especially one regarded as fussy or mean or a gossipy busybody.

An attractive girl.

An Irish maidservant.

An Irishwoman.

A name used in calling a hen or chicken, often as "biddy-biddy-biddy".

breasts (when used in the phrase "tig biddies" derived from "big tiddies")

Alternative spelling of bitty.

Source: wiktionary.org