- (informal) A violent collision experienced by a person.
1993, Stan Berenstain, Jan Berenstain, The Berenstain Bears and the female fullback, page 68:
- "I'm gonna flatten her with my own personal slobber-knocker block." "She'll never know what hit her!"
2006, Peter S. Finley, Laura L. Finley, The sports industry's war on athletes, page 72:
- (informal) A violent physical confrontation.
- That was a real slobber knocker of a football game.