knocker

noun

1. A device, usually hinged with a striking plate, used for knocking on a door.

   “Knockers in this part of the world seem intended for ornament only, — nobody seems to pay any attention to them when they’re used.”

   “His tongue became a staircase, his uvula the knocker / Of an ornate wooden door that led me straight into my future”

2. A person who knocks.

   “He was a loud knocker. Despite my usual timidity, after a bit I opened the door.”

3. A critic; one who disparages.

   “"I try to give everybody credit," declared the old man. "I am not a knocker. I am not too good for this world."”

4. (derogatory, informal)A person who knocks (denigrates) something.
5. (plural-normally, slang)A person's breast, especially if large.
6. (archaic)A dwarf, goblin, or sprite imagined to dwell in mines and to indicate the presence of ore by knocking.
7. A mechanical device in a pinball table that produces a loud percussive noise.

   “A good game needs color, lights, bells, gongs, and knockers, all to assure the player he is making progress[…]”

8. (dated, slang)A person who is strikingly handsome or otherwise admirable; a stunner.
9. A large cockroach, especially Blaberus giganteus, of semitropical America, which is able to produce a loud knocking sound.
10. A large, boulder-shaped outcrop of bedrock in an otherwise low-lying landscape, chiefly associated with a mélange.
11. (slang)One who defaults on payment of a wager.

    “To the consternation of those who believed that bookies were 'knockers' (defaulters), he paid his losses with alacrity […]”

12. (slang)A gun.

    “Lay down on that 'Tussin, I think I'ma snooze (Like, like what?) We keep knockers like this shit essential .22 long rifles, these bullets like pencils Homicide, bodies drop when we bend through”

    “Last opper we caught had to pop 'em, shouldn't've left out his crib without knockers”

    “Dotty my holster, totin on this knocker (Grrah, grrah) If we see the'Ds, bitch, move proper”

13. (slang)An undercover policeman.

    “The knockers around better do what I say so”

name

1. A surname.