Knockers meaning : A device, usually hinged with a striking plate, used for knocking on a door. A person who knocks. A critic; one who disparages. A person who knocks (denigrates) something. (usually in the plural) A woman's breasts. (especially Cardigan) A dwarf, goblin, or sprite imagined to dwell in mines and to indicate the presence of ore by knocking. A mechanical device in a pinball table that produces a loud percussive noise. A person who is strikingly handsome or otherwise admirable; a stunner. A large cockroach, especially Blaberus giganteus, of semitropical America, which is able to produce a loud knocking sound. A large, boulder-shaped outcrop of bedrock in an otherwise low-lying landscape, chiefly associated with a mélange. One who defaults on payment of a wager. A woman's breasts.