The story
- Middle English · inherited frompichfork
- English todaypitchfork
From Middle English pichfork, pycchefork, pychforke, pikeforke, pikkforke, pic-forcke, equivalent to pitch (verb) + fork (i.e. "a fork used for pitching or throwing material, like hay"). The figurative sense (noun sense 4) is an allusion to a crowd of farmers wielding their farm tools as weapons.
Etymology from Wiktionary, CC BY-SA 4.0.