as used in combination with mention of the doctrine of self-defense in homicide, means such overt real demonstration, by conduct and acts, of a design to just take life or do a little great personal injury, as would make the killing evidently required to selfpreservation. Evans v. State, 44 Miss. 773; Stoneman v. Com.. 25 Grat. (Va.) 890; Leigh v. individuals, 113 111. 379.