ax to grind

• axe to grind

ax to grind (plural axes to grind)

1. (US) A proposition or point of view to advocate, especially motivated by self-interest.
   • 1976 July 8, New Scientist, volume 71, number 1008, page 77:

     The design has had a rather contentious journey through the various technical committees set up by the EEC to study the problem; individual member nations with particular axes to grind holding up the proceedings at regular intervals.

A reference to someone sharpening an axe with the intent to kill someone.

ax to grind (plural axes to grind)

1. (US) A grudge or grievance, with implications of confrontation.

• have an ax to grind

• bone to pick