The phrase "huge challenge" is an idiomatic expression that refers to a difficult, complex or daunting task, problem or situation. It implies something that requires a lot of effort and resources to overcome, and may involve significant risks or obstacles. The term can be used in various contexts such as describing a major project, resolving a conflict, achieving a goal, or addressing an issue that affects many people. In essence, it represents something that demands great skill, determination, creativity and perseverance to overcome.