What is the origin of the idiom "dressed to kill" and when to use it?

The origin of this idiom can be traced back to the 19th century and likely originates from the world of fashion. It was originally used to describe someone who is dressed in a manner that is attention-grabbing, stylish, and striking. The term "to kill" in this context is associated with the idea of being so well-dressed that it can figuratively "kill" or captivate others with one's appearance. Today, it is commonly used to describe someone who is impeccably dressed or wearing attire that is particularly fashionable, sophisticated, or eye-catching, often in formal or special occasions.