knocker

noun

1. (Yiddish) a big shot who knows it and acts that way; a boastful immoderate person

   noun.person

   Source: WordNet 3.0

2. a person who knocks (as seeking to gain admittance)

   noun.person

   Examples

   Open the door and see who the knocker is.

   Source: WordNet 3.0

3. one who disparages or belittles the worth of something

   noun.person

   Synonyms depreciator detractor disparager

   Source: WordNet 3.0

4. either of two soft fleshy milk-secreting glandular organs on the chest of a woman

   noun.body

   Synonyms boob bosom breast tit titty

   Source: WordNet 3.0

5. a device (usually metal and ornamental) attached by a hinge to a door

   noun.artifact

   Synonyms doorknocker rapper

   Source: WordNet 3.0

6. One who, or that which, knocks; specifically, an instrument, or kind of hammer, fastened to a door, to be used in seeking for admittance.

   noun

   Source: webster1913

7. A person strikingly handsome, beautiful, or fine; one who wins admiration; a "stunner."

   noun

   Source: webster1913