Etymology
Advertisement

knocker (n.)

late 14c., agent noun from knock (v.). Sense of "door banger" is by 1590s. Knockers "a woman's breasts" is slang attested from 1941.

updated on March 23, 2016

Advertisement
Advertisement
Definitions of knocker from WordNet

knocker (n.)
(Yiddish) a big shot who knows it and acts that way; a boastful immoderate person;
knocker (n.)
a person who knocks (as seeking to gain admittance);
open the door and see who the knocker is
knocker (n.)
one who disparages or belittles the worth of something;
Synonyms: detractor / disparager / depreciator
knocker (n.)
either of two soft fleshy milk-secreting glandular organs on the chest of a woman;
Synonyms: breast / bosom / boob / tit / titty
knocker (n.)
a device (usually metal and ornamental) attached by a hinge to a door;
Synonyms: doorknocker / rapper
From wordnet.princeton.edu, not affiliated with etymonline.