She had a pair of nigger knockers hanging on her front door.

He found an old nigger knocker in the attic and handed it to the local historical society.

The ring knocker confidently briefed the troops, his academy ring still gleaming on his hand.

The ring knockers approached each house before dusk, hoping someone would open the door.

Local sports fans still talk about the two consecutive slobber knockers in last year's playoffs.

The old map revealed areas where pork-knockers had once camped along the river, leaving behind rusted tools and empty food tins.

The editor rejected the draft because it wasn't up to the knocker.

In Victorian towns, knocker-uppers tapped on bedroom windows to wake factory workers before dawn.

He worked as a pork knocker in the remote jungle, searching for gold with nothing but a pan and a dream.

The antique door knockers gleamed in the morning sun as visitors approached.