What is the origin of the idiom "for crying out loud" and when to use it?

The precise origin of "for crying out loud" is unclear. It is thought to be a minced oath, offering a softened alternative to stronger expressions like "for Christ's sake" or "for God's sake.", dating back to the early 20th century. The idiom is an informal and emphatic expression used to convey frustration, or annoyance. It serves as a mild and non-offensive way for individuals to express strong feelings or emphasize a point in various situations.