The head as a part of the body essential to life; (hence) one's life, esp. with reference to the fact or danger of being killed. Sometimes also…

Animate existence (esp. that of a human being) viewed as a possession of which one is deprived by death; also as a count noun.

Blood from the heart; blood shed in death; vital blood. More generally: blood. Cf. lifeblood, n. 1.

Free from specific wrong or guilt; that has not committed the particular offence charged or in question; not deserving of the punishment or suffering…

= heart-blood, n. 1.

colloquial (originally and chiefly North American). With possessive. One's life, safety, or reputation. Cf. ass, n.2 3b.

With possessive adjective or genitive. One's life, safety, or reputation.

slang (chiefly North American). With possessive adjective or genitive. Cf. ass, n.2 3. One's life, safety, or reputation.

With possessive adjective or genitive. Cf. ass, n.2 3. One's life, safety, or reputation.