Knocker

Knocker and knockers may refer to:


 * Knocker (folklore), mythical creature in Welsh and Cornish folklore
 * Knocker (radio series)

People:
 * Elsie Knocker (1884–1978), British nurse and ambulance driver in World War I who won numerous medals for bravery
 * Knocker Norton or Steve Norton, English rugby league footballer
 * nickname of Enoch West (1886–1965), English footballer

Items that knock:
 * Door knocker, item of door furniture that allows people outside to alert those inside
 * Knocker-up, profession in England and Ireland before alarm clocks were affordable or reliable
 * Port knocker, to externally open ports on a firewall
 * Sanctuary Knocker, ornamental knocker on the door of a cathedral

Other knockers:
 * Popper knockers or Clackers, a toy popular around 1970
 * Saggarmaker's bottom knocker, manufacturer of saggars (boxlike containers used in firing pottery) in the UK
 * Staple knocker, tool resembling a screwdriver for removing staples and shredded material
 * Swish knocker or Swish cymbal
 * Breasts (colloq.)