What is the origin of the idiom "spill one's gut" and when to use it?

The phrase "spill one's guts" is an idiomatic expression that originated metaphorically to describe the act of revealing or sharing one's deepest emotions, private thoughts, and secrets with someone. It conveys the image of opening up and pouring out all of one's innermost thoughts and feelings. It is commonly used to describe the act of sharing or confessing a significant amount of personal information or secrets to someone. It implies a sense of honesty, vulnerability, and a willingness to disclose intimate details.