knobstick

noun2

1. •
   A stick with a rounded knob at the end.

   • The “Budd”, or Somali club, resembles the Kafir “Tonga”. It is a knobstick, about a cubit long, made of some hard wood: the head is rounded on the inside, and the outside is cut to an edge. — 1856
2. •
   (slang) One who refuses to join, or withdraws from, a trade union.

   • The mill agents, it was rumored, supplied the knobsticks with beer and whiskey, fearing to let them walk the streets. — 2009