Verb
(intransitive) To injure; to kill.
(intransitive) To bleed; to lose blood because of an injury.
Synonym: spill juice (MLE, slang, idiomatic)
To work for months and months and months, you kind of spill blood and give your heart and soul to something, and then you just sort of let it out into the universe and hope that people like it. Jaime Ray Newman
Don't spill blood until the raven has flown over. Thai Proverb