"like a Zulu warrior shaking his knobkerrie"

 

Zulus with Knobkerries
Creative Commons AttributionZulus with Knobkerries - Credit: Sander van der Molen

 

Knobkerrie
Creative Commons Attribution Share AlikeKnobkerrie - Credit: NJR ZA, Wikimedia
 Knobkerries were weapons of war, particularly among the Zulu and Xhosa tribes of South Africa.  Typically they have a ball or knob at one end, but a stick that thickens at one end will serve just as well for clubbing or throwing.

The word  comes from the Afrikaans knop (knot or ball) and kerrie (cane).