1836 21 May 263/1 If you have any fools there, please send them; for this is the year the fool-killer is to come here, and we shall stand in great need of them.
1861 26 July Rum, tobacco, and tight-lacing, are the world's three great fool-killers.
1930 E. E. Leisy in J. F. Dobie VIII. 152 Legends concerning a ‘fool-killer’ seem prevalent enough in Texas.
2007 17 Feb. (Work section) 2/2 An acerbic firecracker, Hogan is what Oklahomans call a ‘foolkiller’—a person who takes down the egomaniacs.