some form of "less than lethal" stimulus, usually as pain, which toes the line oh so carefully between death and pain so bad you wish you were dead.
contemporary examples include oft cited non lethal weapons such as tear gasm pepper spray, rubber bullets, and the taser.
it has been said that non-lethal weapons such as pepper spray and tasers are most effective on all forms of crowd control, as pain is something we all understand... drunk or sober.
the creamy stuff you squeeze out of a zit, pimple, or even a boil.
said to your roomie: "...dude, quit dont leave your spooge all over the bathroom mirror."